I love to see kissing, rimming, oral, playing with cum, two guy who are really into each other, verbal partners, the start of anal--that initial insertion is great! Flip fucks are hot!
I hate long stretches of anal close up. Show the faces!
But what I really love is the transition from one position to another. For some reason that really turns me on--perhaps because it's something 'authentic' in what is usually an artificial production. So, naturally, I also hate editing where it jumps from one position to another and we don't get to see the guys changing the position.
And the magically appearing condom is cute. But it's hotter to see them put them on. Even better, I wish they would put the condom on each other!