I've tried to strict my self to G1, Masterpieces, and Alternators. But recently I've started collecting a few ROTF figures. I'm confused by all the different type of classes of figures out there. Could somebody please post the line-up of different classes from the very simplest and smallest figures to the most complex and biggest ones? I think the biggest ones are the Leader class figures aren't they? Like the Starscream and Optimus Prime pictured in my collection? What is the best series to collect? Also, which ones are to scale with one another? For example, Prime to scale with smaller cars, Starscream to scale with Prime, etc'. I recently saw a very small Ravage, almost same size as original G1 cassette ravage and was tempted to purchase him as I thought he would've been at scale with other figures.