There are plenty of spoilers in this review, so if you haven't seen this movie yet (and care about it), you might want to wait before you read this.
If Adventure Has a Name...Crystal Skull has plenty of great stuff to offer Indy fans, most notably...
Indy in 50's America: This movie played up the 50's America themes, with references to McCarthyism and "Greasers", and Commies replacing Nazis as villians. The atomic bomb sequence in particular was fun; it was kind of like Indy meets Back to the Future.
Close Encounters: The alien visitor theme was a departure from the norm and hard-core Indy fans might not like it (I myself had my reservations), but I actually enjoyed the alien-centric storyline more than the supernatural themes of the other movies. I know that's because I dig sci-fi more than mystical stuff, but it was neat to see an Indy movie featuring "Men from Mars". And the crystal skeletons were friggin' awesome! Where are the action figures of those?
Indy/Mutt Relationship: The Indy/Mutt relationship was similar to the Indy/Henry Jones Sr. relationship in Last Crusade, and like that movie, it worked really well. And this movie definitely needs a young-un, as "Dr. Jones" is looking pretty geriatric.
An Action-Packed Romp:In press interviews, George down-played the action in this movie, but it actually was pretty awesome. The movie is basically one long, insanely varied chase sequence, with bike chases, car chases, native chases, ant chases, and even monkey chases. And any movie with monkey chases is a-okay in my book.
Dr. Juan Itor: That's right, this movie features the Janitor from Scrubs as an FBI agent! He doesn't really add much to the movie, but fans of Scrubs will get a kick out of seeing him on the big screen.
I've Got a Bad Feeling About ThisUnfortunately, Indy actually said this tired old phrase in this movie. It was cute the first few times, but it's been totally overplayed and now it's trite. It's like the Wilhelm scream... enough with it already. But there were other aspects that I disliked...
Fun with Telepathy: The film was pretty predictable. Maybe it was because they followed many of the formulas established by the previous movies, but as the movie progresses you'll know exactly what will happen.
Almond-Eyed Freaks:I just finished praising the aliens above, but there's one MAJOR flaw with the aliens that must be noted. The "living" aliens at the end are the same, boring-ass almond-eyed aliens that you see in EVERY SINGLE MOVIE. Gone are the interesting, imaginative alien designs of yesteryear (like the three-eyed weirdos in the original War of the Worlds) in favor of the same old rehashed crap alien. Really, this is the best that they can do? I wish they just stayed in skeletal form.
Indiana Jones and the Neverending Movie: This movie feels long. Too long. It's just over 2 hours in length, but it feels like it could lose 15-30 minutes and be perfect. But you know the trend for "blockbuster" movies these days... make them as "epic" (read: long and bloated) as possible.
I'm not exactly sure, but I suspect it might have something to do with a difference in resolution between film and CG. Film has very high resolution, higher than most computers. If the resolution of the special effects doesn't match that of the film, it makes the effects look less detailed and fake. Or, maybe the animators aren't catching realistic movements. Regardless, it seems like they still have a long way to go.