I'm almost 33, owned my 07 WRX wagon since new..
you could classify all my mods as.. subtle.
Exterior, a side from a front lip, lightly tinted windows, modest lowering and gold STi BBS's.. you'd think the car was stock driving by.
Same sorta goes for the interior mods.. EvoX Recaro seats (for comfort), S204 dash (cause black is nice to look at), matching black back seats, and double din screen ... absolutely nothing flashy.
Underhood comes in the form of a pro tuned VF48 with supporting mods and a V9 STi limited drivetrain (black brembo's, R180, 5x114.3...)
Everything looks like it came from the factory like this.