I've waited a bit before posting in here, because I've been trying to figure out my feelings on this movie.
To be honest, I still don't have what I'd call a final assessment. I've seen this twice now, and I do enjoy it. I have some problems with the actual happenings in what is supposed to be the 'REAL' world, but that doesn't mean that I can't like the movie. I have problems with flow in a lot of movies, and it doesn't take away from my ability to enjoy them. I look past it, and just try to take the story for what it is.
There are two things that stand out quite a bit to me, or rather, there's two sides of the same coin - because really they are very connected.
It seems fairly obvious to me that a lot of the information is very vague, especially concerning characters, and how they do what they do. Now, some have stated that this is a genius stroke by Nolan, because that's how it would be in a dream. Point taken - BUT - I'm not completely convinced. It's been the case many many more times that this is simply a product of a writer that gets into a corner and isn't sure how to get out. One of the major problems with writing something that is so new, so original, is that as a writer you can get lost. I know. I've done it myself. I always look at a story that I've done this to myself in, and go, "Wow, I have just completely fucked myself, my characters, and my plot right into this corner, and there is no fucking way out. At all." I'm wrong about this though. There is an easy way out, and that is to be vague. The problem with this solution is that before this, you were likely being very specific, and there are parts of Inception that are VERY specific. Then it goes back to being vague. That's kind of where I start to fall off with how much I like it.
Inception is a good movie, and with Hollywood churning out so many sequels, and remakes of old 70's tv series, and conglomerating 80's action heroes (Yes, I like 'The Expendables too, but come on...) Inception is actually a breath of fresh air comparatively. Is it the greatest story ever told? Not to me, but I'd be hard pressed to make a choice on what is, so take it for what it's worth. Is it the worst story ever told? Hell no. Not by a long shot.
It's a good movie, that I will probably enjoy watching a few more times for one simple reason. It makes me think about things from different perspectives. That's my particular cup of tea, and I like it. If it's not yours, you'll probably either find it bitter, or bland, but you're not likely to enjoy it as much as me.