I quite like bromances, of all types, from war buddies rescuing each other to not-brothers-brothers being all-in-all to each other (and then there's Castiel!). I like bromances with romance...
And I like bromances without romance.
Ryan and Esposito from Castle strike me as one of the best male friendships without a romantic element out there. I'm sure someone somewhere has "shipped" them. But I find their platontic partnership and easy camaraderie entirely believable. Unlike some (not all) television bromances, I don't feel like the wife/girlfriend is thrown in to remind us "uh, no, really, they are heterosexual." Ryan with Jennie (played by his real-life wife) and Esposito with various girlfriends, including Lanie, continue to be good friends. Their lives and personalities expand without them dropping that best friend from work.Good writing and acting!

