Title says it all. What is your favorite gimmick from any of the Transformers toy lines (aside from transforming, obviously) and why? My personal favorite is combining. True combiners (not Power Core Combiner drones, Minicons, megazord wannabees, or armor suits for Optimus Prime) have always been my favorite among Transformers and I'm disappointed that there has been a lack of proper and well designed combiners since RID. I am glad that that Hasbro tried to attempt creating combiners with the PCC, but the execution was total crap in my mind. How about you? Discuss.