I find the unpainted bumpers really unattractive, but for an extra few thousand BMW makes a body kit that looks very nice. I was really impressed by the flip-up navigation screen at the top of the dash, but I'm a gadget geek.
I'm a huge fan of the panoramic sunroof and I suspect that it will begin to appear on many more cars in the next few years. The only cars I know of that already have it are the Mini Cooper, Chevy Malibu Maxx, Scion tC, Mercedes E-Class, and the X3. Any others?