Voted for the Lego games because they're simply ridiculous. My hatred of Lego Star Wars is only just above my hatred for The Clone Wars (except the 2002 game totally unrelated to modern Clone Wars - that was quite good).
Republic Heroes could've been good, I just found it somewhat repetitive.
I've played all of the others (except Masters of Teräs Käsi & Kinect), and they're pretty good. TSLRCM and M4-78 EP are essential for TSL though.
Lethal Alliance I've got on the DS - it seems rushed. A good plotline and style, but it's considerably buggy and the graphics really aren't very good.