Reading through the answers I have decided to do the opposite - I'll put what I like to see at the table I play. I am doing it this way, because most of these things are those who someone else pointed out as "not liked"

Keep in mind my experience is only online.
So:
- I like my opponents to do every stupid thing they can imagine - going all in with rubbish, caling or raising with some nonsese draws, being over agressive, betting every hand, limping alot,
bluffing too much - an yes, sometimes hitting this one lucky outer on the river - I accept they need to get lucky from time to time to keep doing what they do. Even if I loose stack to them (I admit it is painfull), but it does not change the fact they are opponents I want to play against, they are all welcome at my table, especially in cash games

- When someone starts talking (chatting), tutoring others (me included) after winning or loosing the hand (desn't matter) - I mark him as an opponent I want to play against - for me there is a good chance they are not a good players, they just pretend to be good and show it around
- In general, when oppontents do show emotions it is a good thing - there is a chance they tilt, start making mistakes etc
- I like whan I am with very small stack at the bubble, when others with small stacks play slow, use their time banks - it shows me they understand the game and play to surivive to payout, which I find really reasonable