I can't really think of 10, I tend to just buy everything, but I suppose this list of films are some which I'd love to be able to get on Blu without going region free.
Strange Days - this is the main one, I'm going to buy the German disc soon I think.
Nightbreed (The Cabal Cut) - I know there is a Spanish one but it has no supplementary material.
Return of the Living Dead (Part 2 and Part 3) - Will
Part 2 ever come out - it's WB so probably not... Hopefully 3 will come out in Europe after the American one.
Zombi 4 and Zombi 5 - Just because...
The Abyss - There have been a few hints that this might be coming at some point.
The Beach - Quite honestly I've given up on this one...
Sorcerer - There was an American disc but it's OOP
SubUrbia - Lost Richard Linklater film that I don't think has even been on DVD... Thoughts are that the soundtrack is to blame, featuring acts such as Sonic Youth, Beck, Ministry etc.