imo the only good lego game is lego star wars the complete saga
The major problem I had with LSWTCS was the challenges the developers introduced for people going for 100% completion; you're expected to complete every single level in the game a minimum of 4 times (Story, Freeplay, Blue Minkit, Super Story), including the woeful Super Story (finish all the chapters in an episode in one hour or less) and those bloody awful blue-minikit challenges.
But yeah, the original Star Wars games were far simpler and the mechanics were very consistent, and there's only a few levels I had a bit of displeasure playing (such as the Kashyyyk Beach).