do you have in your inbox? I've got about 919. I don't delete anything. Ever. I think I've deleted my sent PMs at one time or another though because I've only got like 500-550 outgoing, if that.
Makes me glad I've got room for 10k. I can collect them for the next 5 years before I have to worry about backing them up.
Speaking of which.... I need to get my credit card paid up today. I keep forgetting. Grrrr, it's going to go into collections soon.
I delete everything after responding. I'm like that about my email as well. I don't like it being all cluttered.
I'm just not too big on PMs in general. If I want to PM somebody I usually wouldn't mind talking to them on a messenger