Some favorites that I can think of right now:

Logan Fucks Dawson Part 1 from Corbin Fisher

Fucking Cole Part 2 from Corbin Fisher - I found the tongue-sucking to be really hot

Parker Drills Patrick from Sean Cody - sensual kiss at the end, Parker's cocky smirk as the screen fades, plus it's even hotter considering how awkward they were in the beginning

Brian and Blake from Active Duty

Dorian and Diego from Active Duty - love the look they give each other before the first kiss

Max and Payne from FratPad - http://www.redtube.com/769147 - the shower scene at the end is amazing, and I'm pretty sure you can see Max mouthing, "I love you, man" as he kisses Payne

Max and Taylor from FratPad - the buildup to each kiss is great

Alexsander Freitas and Craig Reynolds in "Major Asshole" - kissing with some rough manhandling

Jeremy and Trent from All American Heroes - the kiss itself isn't impressive so much as when the more aggressive guy tells the timid guy to kiss him