I made a couple but didn't really go with it so they are closed. But I opened The Tech Zone around 2 weeks ago and I'm trying to get it active and make it into a successful forum.
A grand total of two. Be Creative ran until the database got botched. It was fairly successful while it lasted, reaching 460 members and over 60k posts in less than a year. Then I set up Hortorian Forums which has got 150 members and over 10k posts since mid February.
Even though I have started over a few times (went to phpBB3 a couple of times), I still use the same name since opened the first version in March of 2004.
I've made way too many to count. Some I thought would take off, but didn't (didn't help I was on free hosting at the time!) One was on advanced hosting and very nearly succeeded, until I was stupid enough to close it and then try to revive it, and now I'm trying to go strong with my current forum which will be 4 months old on Thursday I believe.