I have 1116 M/M romance on LibraryThing, so for my BWA bulletin, I thought to find what are the most shared among them and through them to draw up a top list of the Best M/M Romance. To them I added the books of the previous bulletin (the books tagged as "Gay Romance" on Amazon). Every book has one point for every copy owned on LibraryThing. And so here is the top 50:

1) Call me by your name by André Aciman (202)
2) Menage by Emma Holly (117) (read before LJ)
3) All Through the Night by Suzanne Brockmann (111)
http://elisa-rolle.livejournal.com/192101.html
4) Comfort and Joy by Jim Grimsley (88)
http://elisa-rolle.livejournal.com/260940.html
5) The Back Passage by James Lear (66) (to be read)
6) A Strong and Sudden Thaw by R. W. Day (48)
7) Brethren: Raised by Wolves by W. A. Hoffman (45)
8) The Tin Star by J.L. Langley (44)
http://elisa-rolle.livejournal.com/1191.html
8) The Phoenix by Ruth Sims (44)
10) The God Eaters by Jesse Hajicek (43)
11) Standish by Erastes (41)
http://elisa-rolle.livejournal.com/15429.html
11) The price of temptation by M. J. Pearson (41)
13) Bareback by Chris Owen (40) (read before LJ)
14) A Bit of Rough by Laura Baumbach (37)
http://elisa-rolle.livejournal.com/2623.html
14) Ransom by Lee Rowan (37) (read before LJ)
14) Vintage : a ghost story by Steve Berman (37)
14) Discreet Young Gentleman by M. J. Pearson (37)
18) Latter Days: A Novel by C. Jay Cox (34)
19) All American Boy by William J. Mann (33) (to be read)
20) Deviations: Submission by Chris Owen (32) (read before LJ)
21) An Agreement Among Gentlemen by Chris Owen (31) (to be read)
22) Wicked Gentlemen by Ginn Hale (29)
22) Without Reservations by J.L. Langley (29) (read before LJ)
24) Deviations: Domination by Chris Owen (28) (to be read)
24) A Secret Edge by Robin Reardon (28)
24) Matelots: Raised By Wolves by W. A. Hoffman (28)
27) The Hell You Say: An Adrien English Mystery by Josh Lanyon (27) (to be read)
28) The master of Seacliff by Max Pierce (25)
29) Out There in the Night by Laura Baumbach (23) (read before LJ)
29) Falling by M.L. Rhodes (23) (to be read)
29) L.A. Heat: A Novel by P.A. Brown (24)
30) When You Don't See Me by Timothy James Beck (23)
33) Details of the Hunt by Laura Baumbach (22) (read before LJ)
33) Roughhousing by Laura Baumbach (22)
http://elisa-rolle.livejournal.com/31797.html
33) Winds of Change by Lee Rowan (22) (read before LJ)
33) Razor Burn: A Romentics Novel by Scott & Scott (22)
http://elisa-rolle.livejournal.com/155801.html
37) Willow Bend by Ally Blue (21) (read before LJ)
37) Spare Parts: A Romentics Novel by Scott & Scott (21)
http://elisa-rolle.livejournal.com/190236.html
39) Natural Disaster by Chris Owen (20) (to be read)
39) On Fire by Drew Zachary (20)
http://elisa-rolle.livejournal.com/34403.html
39) Three Day Passes by Sean Michael (20) (to be read)
39) Bad Case of Loving You by Laney Cairo (20)
http://elisa-rolle.livejournal.com/40712.html
39) Into This World We're Thrown by Mark Kendrick (20)
44) Strings Attached  by Nick Nolan (19)
45) Oleander House by Ally Blue (18)
http://elisa-rolle.livejournal.com/31109.html
45) Jumping into Things by Julia Talbot (18) (read before LJ)
47) 911 by Chris Owen (17) (read before LJ)
47) The Broken H by J.L. Langley (17) (read before LJ)
49) Soul Mates: Bound by Blood by Jourdan Lane (16) (read before LJ)
49) Out of the Closet by Sean Michael (16) (to be read)
49) Scarlet and the White Wolf 1: The Pedlar and the Bandit by Kirby Crow (16)
http://elisa-rolle.livejournal.com/3266.html
49) Scarlet and the White Wolf 3: The Land of Night by Kirby Crow (16)
http://elisa-rolle.livejournal.com/74342.html
49) The Name of the Game by Willa Okati (16)
http://elisa-rolle.livejournal.com/47199.html
49) My Fair Captain by J.L. Langley (16)
http://elisa-rolle.livejournal.com/106500.html
49) Tempestuous by Morgan Hawke (16)
http://elisa-rolle.livejournal.com/144715.html
49) A Private Hunger by Sean Michael (16)



Some points:
- I don't believe to have all the possibly worthy M/M romance, so please, if you notice a title you think should be there, tell me, I will look on LibraryThing how many copies there are and put it on the list. Plus, if you haven't a LibraryThing account, but you have the book (or ebook) please tell me and I will add a point to it (I don't ask a proof of ownership, I will trust my friendlist, so please, no multiple votes :-))) )
- Do you know another (serious please), online catalogue? If I find it worthy of attention, and with a valueable data base, I will add the number of copies to the list above.
- I needed to make a choice and so I will consider only book for the first time printed in the twenty one century (from 2000 on). I know it's an hard choice, but otherless I will open an ocean!
- Every month (if I can) I will update the list, so if you are interested, you will always have an updated source: my source will be LibraryThing and Amazon (50 books for Bestselling in Gay and Lesbian Romance and 50 books tagged as Gay Romance)
- Obviously two books on the top 10 list are also books written by classic romance authors who tried the M/M romance genre, so I think they have a bigger audience and for them it's simplier to be on top. Don't mistake me, I think they are both worthy books, and Menage is the first book I read with an M/M relationship, so maybe, they are a good vehicle for readers to arrive to the real M/M genre and authors.
- I'm very happy to see 2 books by Kirby Crow's series, Scarlet and the White Wolf, on the list. I like a lot this writer, I think she deserves a wide audience, still there are very few "rumors" about her on the web. Is it a case of books which sell without mediatic "can can"? A reason more to consider them very worthy books?
- On Amazon, G.A. Hauser has a big audience, but here no one of her books are on the list. Very strange, since I think she has a very particular style, very original stories, and they are pure romance, so, usually, a genre with a wide audience.
- My big congrats to Lee Rowan and Erastes to be on the list, both here and both on Amazon. You have a very faithful readership!

In the end, many of you are wondering why I'm doing this? Well because I'm nut, and you will forgive me because you are my friends! 

Here is the link to the LibraryThing account I opened appositedly for this purpose:
http://www.librarything.com/catalog/top50MM