I just watched "Mystery Train" and felt like sharing some thoughts about it and Jarmusch in general. I've been on a bit of a Jarmusch kick lately after watching "Down By Law" and "Stranger Than Paradise". With all of his movies, I find myself liking parts more than the whole. Perhaps more than any other director, his movies are very clearly divided into acts or segments, and in every case so far, I've found some acts excellent, and others dull. I've yet to see one movie by him that I loved from start to finish. That's the risk in always doing things in a sort of compilation format.
Along with the ones I mentioned, I've also seen "Night on Earth". In "Night on Earth", I hated the Benigni Italy segment, but liked the rest. In "Down By Law", I was bored at the beginning, but started to love it once the characters got to prison. In "Mystery Train", I was enthralled for the first segment. I loved it so much that I think this might have become one of my all time favourite movies if the whole movie had stayed with that segment's characters.
Unfortunately, the last two segments didn't do as much for me. Their characters were not as fun (aside from the returning hotel staff) and I didn't get much pleasure out of watching them. It was novel to see Buscemi looking younger and Joe Strummer actually playing a character instead of just making a cameo, but what happened to them didn't excite me.
I really liked the Japanese characters, especially the girl. Her attitude and dialog were adorable. The guy was cool at first. Then, he started to drive me nuts with his being relentlessly stone-faced no matter what she did, even when she was being unbearably cute and affectionate trying to make him smile.
Then again, I guess if he'd reacted to her behaviour the way a normal person would, their scenes together wouldn't have as much intrigue. At least he finally came to his senses when she threw her clothes at him and got under the covers. I was starting to think maybe he was a eunuch. 
I was really disappointed by "Stranger Than Paradise". It seemed to be one of those movies where nothing happens, but I was willing to go with it and give it all the time it needed to get somewhere interesting. By the end, I STILL felt like nothing had happened. Really disappointing. The only pluses were the performances and some nice dialog. Jarmusch again showed a talent for casting unknown actresses who have a really lovable charisma about them. I just wish the girl in that movie had been given something more interesting to do.
Fortunately, "Mystery Train" felt like a big improvement from "Stranger Than Paradise" and reignited my interest in Jarmusch. While none of his movies have worked for me from start to finish, "Down by Law" has come closest, and I expect that eventually I'll find one that is completely satisfying. Now I just have to decide which of his movies to watch next between "Dead Man", "Ghost Dog", and "Broken Flowers".