Right from the first moment of my first sexual encounter with a man, kissing has been of primary importance to me, both as an expression of intimacy and as a means of arousal. I've mainly kissed other men in private because in most parts of prudish Canada (and I assume the USA) the sight of one man kissing another in public remains a big taboo.
Quite a few men won't kiss another man during a casual hookup, regarding it as too intimate. Everyone should have to the right to their own preferences, of course, but it does seem odd to me that those same guys will then take a total stranger's cock and/or balls in his mouth (or stick his cock into their's) and not regard this act as "too intimate." Just sayin'....
Except for when I'm giving a backseat blowjob to some anomymous (usually married) guy, I expect to be able to kiss the man I am with and generally will not hook up with a guy who refuses to kiss. But it's not usually an issue since I discuss all this in advance of meeting in person.
Another issue which has come up recently (and resolved) has been the use of tongue during kissing also known as French kissing. To tongue or not to tongue?
I love French-kissing as long as it doesn't involve having a tongue jammed down your throat. The object is not to test your gag reflex but to play "tag", touching the other guy's tongue briefly and then retreating and inviting him to respond in kind.
I like to lightly sweep the tip of my tongue over the other guy's lower lip. I also enjoy playing "capture" on a guy's tongue when it darts into your mouth, holding it there for a brief moment by lightly sucking on it. Sweet!
I wonder what anyone else thinks about kissing?