For all the Steve- dislikers, I question whether or not it is a dislike or merely we feel a bit of pity for him. He's kind of turned into nothing more than a basket of non-stop relationship problems when we see him, ever since the first break-up with Ellen over the whole "moving too fast" issue. So now he's either a raging alcoholic on par with how Faye used to be, or being emo over the fact his love life is shitty. He's kind of a gag character now, just someone to pull out of a box so Martin can have that one (one) guy friend to talk to about guy stuff, though to be honest that never really happens either.
As for characters I dislike, it has changed over time, first I didn't like Faye then Dora. Faye originally cause she was a bitch to certain un-understandable extremes, even finding out about her father's death didn't completely redeem her. Now that she is changing, she acts more like a person someone would actually want to be friends with, still an asshat at times, but a fun asshat. Dora has gone from being somewhat depressed, yet still possessing a strong backbone, to now, where she claims to be in love with Martin but is overly paranoid as shit about it jumps at honestly little things.