I don't know why, but I just hate the idea of stormtroopers being clones. Although, I hate the idea of Jedi willingly leading clones even more, that's beside the point! =)
A few things I don't like about it, I guess is that in SW they have different voices for starters, they're also different heights. Also when Luke and Han are in disguise, no one notices them as any different from the others even though they are not even close to the same height. I don't think they were ever supposed to be clones, honestly.
But apart from that what I really don't like is that I don't think the clone technology can be around in SW. It just wouldn't make sense at all in the OT. If the Emperor wants someone to replace Vader like he did Luke, why doesn't he just clone him? Or why doesn't he just clone 100 Vaders? It really doesn't make sense in the PT as it is now either to be honest. Why clone Jango? Should have just cloned a million Darth Maul's -- game over.
Another note, is that I just think that the PT should stand on their own. A read a post the other day about how the SW world seems to be just too small because everyone is related to everyone and everything. I'd just like to stay away from that whole thing.