I don't like lol, but I don't mind it too badly when it's being used where the person would genuinely be laughing out loud. When people use it as a placeholder or punctuation, which is often the case, I regard it as I would someone who actually laughs at inappropriate points in a conversation. Not positively to say the least.

I'm noticing that I like capital LOL more than lowercase lol: this is either because LOL is an acronym, or because I've just been primed by the two of you.