I have been a wargamer as long as I can remember, pretty much.
My interests spread pretty generally across the entire historical period. I mostly prefer to develop and use my own rules. As such I've been a member of Wargames Developments since the early 80's.
I do use commercially available rules and have a large collection, - many of which have been played. I've been fond of the RFCM approach from Peter Pig in the past, and I make a lot of use of Neil Thomas' rules. They always seem a good place to start.