I tend to stick to rulesets that I like and know now, so when I’m gaming, I can concentrate on what I want to do rather than constantly referring to the rulebook, or even worse confusing rules from one set with another. There is a good article in the latest issue of Warning Order from Wasatch Historical Gaming Society that touches on the subject of why rules go out of fashion. When I was part of a club new rules became very fashionable to have/play, but often were dropped after 6 months when another new set arrived, they got bored of them etc. However I do like to keep abreast of what’s going on, via this forum, magazines etc. The odd gems come up such as Bloody Big Battles, so you never know what might be on the horizon that tickles your fancy.