I'm sorry, but it just has bad quality/reliability issues, as do many newer Chrysler products. The interior is very cheap, hard, and plastic-y. It does not drive paticulary nice, and the four-cylinder engine is appearantly slow and noisy. I geuss it's an ok car, it is just not nearly as good as any of the others on the market.
I'm not talking about its styling necessarily (which is most likely what you like about it), I don't really mind the way it looks. Although it does have simply horrible visibilty, especially because of the "hump" on the back door, along with the high decklid. But many other newer cars have poor visibilty also, so that's not too unique to the Avenger