I download TF shows when I can ... I think I'm pretty much caught up. There is that entire Robot in Disguise and Armada line ... but I'm not too interested.

The beast era had the best storyline, but the worst toys.
The energon / superlink brought a retro feel back to the line
The galaxy force / cyberton series is just bad ass. Top quality animation, terrific story, detailed toys ... this is really the best ever.