I started out life with a DOD FX25 - the same one in the Flea video in the 90s.
Currently I'm loving a Lovetone Meatball Clone which does everything I could ever want from an envelope filter.
In the middle of all that have been a couple of Q-trons, a Q-tron plus, a mini (and probably Micro) Q-tron too, and my main squeeze for a good long while was the a clone of the Chunk Systems Agent 00Funk which is my second favourite.