I've had my car for almost 3 years now and have done a few modifications. It has a rear sway bar (Subaru), short shifter (Subaru), K&N filter, front strut tower, and Whiteline anti-lift kit. My goal was to keep it in warranty but have fun in the corners. I've gotten rid of the excess body roll but need a little more power (like 15 hp). In the snow and rain it performs like a dream. I would recommend all of my upgrades to anybody that wanted a more sporty feel in handling.
AWD, interior/exterior styling, price, and head room.
Cabin noise after 1-2 years is horrible; they are just little rattles and squeaks but they drive me nuts! Make the rear seats fold down type (this is a Subaru after all and people do buy them for snow sports!).