So, let's start a serious discussion for a change (flame war, flame war !!!)...
How can some people say that Skull is better than Temple ? Temple is the worst of the originals, granted, but still was fun in a naive kind of way... and some of the scenes are really great (mine carts, bridge, banquet) and belong to Indy's myth. (Plot spoilers ahead if you care).
I didn't hate Skull, but it could have been a much better movie (basically they could have taken Fate of Atlantis script... ANY of the three paths would have been better). The story is the main offender, really, the whole aliens/skulls thing is confusing even though there is much more plot exposition than the previous movies, and the sci-fi twist feels really out of place in the context of the series. The interplay between Mutt and Indy is not bad, but the whole "Indy has a son" thing felt tacked on.
Most of all, WTF, in the second part it became sort of a school/family trip, I mean FIVE good guys? It has always been Indy vs. the World, and it really felt dispersive. Besides, no one of the others really did anything for me, at least you can HATE Short Round and Willie... Marion had that idiot stupefied smile all the time, and the bitching with Indy lacked the spark of Raiders big time. I really think was a mistake bringing her back.
The fridge.
Good points : good chasing scenes, good setting and villains (I was skeptic about the "evil commies", but in the end they were not so bad), and Harrison Ford delivered as usual.