favorite gimmick? i'd have to go with trucks with trailers that convert into bases/play sets / power ups for robot mode

i love them all from landmine ( not quite a truck but you get the point ) to g2 laser prime i think they give so much play-ability which was fantastic when i was younger , and al ot of posability it takes a long time for the figures to get " old" because there is always a different way to have it displayed

favorite sub group would have to be the seekers i love the way they developed there personalities and really managed to "sell" the same toy over and over by giving it a different personality that makes the toys feel like more than just another repaint