After all my comments about Freeserve, I tried AOL. I lasted less than 2 weeks!
I found it very difficult to get used to having been "brought up" using Outlook Express and IE. It seemed to take over everything and my PC ran slower. The Norton CPU usage meter ran at 70%+ whenever AOL was open regardless of whether or not I was actually using it.
If you can put up with the differences then AOL is OK (20m+ people can't be wrong, can they?) but it is IMHO an acquired taste.
I'm still with Freeserve for now on the unlimited time package (closed for new subscriptions). They're "anytime" is £3 pm cheaper than both AOL and BT so may be worth considering. I can't believe I wrote that!