A. Europhiles wanted the Euro MKII Focus in 2005-08
B. First Gen fans only like theirs and were mad that the hatches were dropped in 08.
But, I think the MkII is ugly, hatchback looks like a wedge and the sedans is like the boring 2005-07 Ford Five Hundred. And, 2. while I like the old Focus, some car fans don't like anything that makes their's 'old', so they hate newer cars and cling to the past. Mustang fans are like this, for example, some only like the 87-93 or the 60's versions.
I liked the 2008 when it was new, since it looked more upscale and luxurious. While this turned off fan-boys, it get more buyers, and is more reliable, since bugs are worked out from first gens.
It's just personal tastes. I'm sure there are some cars where you like some gens better than others. I personally don't dislike the 2nd gens but I wouldn't buy one as my next car or anything. I've seen several on here that are really well done that I wouldnt mind borrowing or driving for a few weeks 
I would have liked to had a wagon myself. but you get what you can, when you can get it. I needed a fun DD and just had to go with a FoFo. I just hope more companies start making good aftermarket parts for us soon, like cams, intake manifolds, supercharges and what not.