I feel like I am going to set off a powder keg by coming onto this forum, but of all those movies, I have Dreamscape and Somewhere in Time on Instant View and I don't think I have heard of Spellbound, but I did not like Brazil, but I did love Eternal Sunshine, I bought that movie (rewatched it a few months ago, It's like a fine, weird tasting wine) but Brazil didn't do it for me.
Brazil worked like this for me: In almost all my math classes, The answers were always in the back of the book. They never really told you how to do the assignment, they just gave you the answer, and the assignment page had the question. In really simple math lingo, You have "A" and you have "C" on the back page, but "B" is what you need to figure it all out.
With Brazil, I had "A" (The Main plot of it all) and I have "C" (The Understanding of the ending), but I have no idea of what "B" is (How everything in the middle makes heads or tails to anything that happened throughout the entire movie).
I'm not going to say I wouldn't maybe consider watching it again sometime, but perhaps if I had a veteran try to explain it to me (And by then, it's almost like cheating), I might understand it all, but that's my take on that.