There are a few occasions where I won't bother to rez someone;
A. In the middle of a fight you rez slower, and you yourself are vulnerable. If the guy on the ground is getting bombarded with AOEs I'm not guna go near it, it's pointless to even try. Though if it is in PvE I'll just whack a Shadow Refuge on top of em and give em a rev, in fact sometimes it even works in PvP. If they are fully downed however it takes far too long to revive them whilst in combat, so chances are I won't bother.
B. I've been laying downed next to a PC whilst watching them auto attack a monster to death, I die and use the waypoint and come back to the DE (this is Claw of Jormag elemental stage by the way). Moments later the aforementioned PC is downed nearby, mist forms next to me and starts asking for help. I think not.
C. Last and certainly not least, recently in the Fractals with a PUG, come up to the Dredge Mining Suit boss. One guy clearly has no idea what he's doing, despite everyone explaining it several times, he keeps the boss still, allowing him to heal and also repeatedly dying. After the boss had already taken twice as long as it should I think the sudden realisation to leave the guy dead for good came over the whole group (we did revive him after the boss was dead however, just nice like that.)
Basically if it's going to inconvenience me, I know you wouldn't do the same for me, or ... well if you are already inconveniencing me then don't expect a rev. Other than that when I see a player go down expect me to dodge over to them, stealth the pair of us (though normally wasted by the AA spam from the downed PC) and get that lil guy back on his feet.
EDIT: Whole post pointless didn't see the "after fight bit". Yeah if the person's annoyed me already I wouldn't rev them. If not I see no reason not to.
Edited by Isbaluna, 26 November 2012 - 04:09 PM.