I am also in my 30's and just recently had mine removed. They were not causing me any trouble, but they were very far back in my mouth - it was hard for me to brush and even hard for the hygenist to clean, etc. I spoke to my dentist and then to the oral surgeon about their reasoning why I should do this when they are not causing problems and could never cause problems. I decidd to go ahead and get them taken out now before any issues came up. It could be that it was done for no reason, I'll never know, but I'm semi-relieved to have it over with.
I have 2 small children at home and recovery wasn't too bad. I had it done on a Friday morning and had the kids with a sitter until my husband picked them up from work that night. So all of Friday I was sleeping, resting, etc. Saturday I felt a bit better (no pain, just discomfort) and did more around the house, with the kids, etc. Sunday I was back in my normal routine. I felt "off" for about a week or so - but there wasn't pain, etc - just a little discomfort, etc.