what image size should I use?

[ponygirl]

ok, so here's my question - how much compression is too much? I can tell if they start to look really crappy, but how much of a percentage do you leave for compression before you know you just have to cut 'em down more?

I'm just asking because I know some reviewers are sticklers for quality but to be honest, sometimes I see sites that have been rejected for this (not mine lol I don't think) and I can't see that the pics are that bad.

Ponygirl