I think I wouldn't have minded the edits like Greedo shooting first and Han stomping on Jabba's tail if they just weren't so crappily done!
When Han 'dodges' Greedo's laser shot, it's like they did a Photoshop Lasso cut, and shifted Han to the left for 5 frames then shifted him back. It just looked *soo naff*
And when he steps one Jabba's tail - again, Lasso cut, shift up for 10 frames, shift back down. Gah!
And Jabba's rendering was so crappy - The *puppet* looked more realistic FFS! (Well, I suppose it *was* real technically...)
See, some of the edit's were good - For instance, that part where Han is chasing some stormtroopers down a corridor in the Deathstar, and suddenly he's like, "AAA!" and runs away.
In the original, it's really stupid because he runs into like, 4 troopers. Not too scary.
In the edit, he runs into more like 4 HUNDRED troopers

Almost all the edits in Empire were very very good too - I actually prefer the enhanced Empire's.
They ruined the ending for RotJ IMHO 'tho - The music doesn't fit and that attempt to integrate the Ewok helmet xylophone was just so pathetic.
I liked the original better, even if the song did make me cringe and want to kill small fuzzy bear-like beings

(And no I don't mean the Ob'enn)