When the 5th gen Pokemon came out, I was pretty disappointed with their designs, along with several other users. People kept saying "this is how people feel with every generation's release, but you'll get used to them". Unfortunately, the 5th gen Pokemon never grew on me. I dunno, I just think most of the designs are ugly, and I know it's not just me. Don't get me wrong, I enjoyed some of the Pokemon designs, but only a few of them.
I can honestly say that I'm liking all the 6th gen designs so far. Sure, I don't like all of them, but I'm liking most of them.