2005 Volkswagen Jetta GLI 1.8T 4dr Sedan (1.8L 4cyl Turbo 6M)
The car is great. It's fun to drive, it looks good, and it's not too expensive. But seriously...those front seats are just way too narrow. I'm not abnormally huge, but I just can't stand sitting in them for more than an hour or so. And the backs seats are made for toddlers. They have no leg room at all. Everything else is cool. The Tiptronic transmission shifts well, the features and controls are great. The trunk is huge, and nothing has really gone wrong. The only other complaints I have would be the low front clearance (I scrape it on everything) and the low profile tires. A crack in the road in Houston blew out two tires and dented the rims. Oops. All in all, though, this is a great Volkswagen.
The sporty look (wheels, body kit), sunroof, and electronics.
Add more padding in the seat bolsters, more rear legroom at the expense of trunk space, more power, and give it better gas mileage (contradictory? I think not).