I've modded my Fit mostly for things to make it look better and for things with a purpose:

Turn signal mirror covers(Safety)
Hood deflector(Bugs!)
Window Visors(Air during rain!)
RS emblem(looks)
Front and rear Type R red "H" embelms(looks)

Other than that i wouldn't do too much more.

I want rims but I can hold off on that.

The things that piss me off about cars on the street:
HID's in general
Altezza "Euro" rear lights
Unpainted Body Kits - put the kit on when you have the money to mount and paint it
Autozone/Pepboys rear spoilers. THEY DONT MAKE YOU GO FAST
Stickers when you don't have those parts on
BMW fender vents on any car other than a BMW
Spinning hubcaps

 

Are you kidding?
Spinning hubcaps are the sh1t.

 

OH WOW! I remember the days before I got my kit painted haha people would write ricer on my doors with tooth pAste. Now its all done and people just write fag on my windshield. haha

mine is so conservative to! not like that mazda

 

The wing was the "in" wing to add back in the day when that Mx3 was new. I think wings west had a crapload of those wings for just about any car you could think of.
The body kit is horrible, but I've never been a fan of the "combat kit" look.
There's an Integra that I see around Livermore on a semi regular basis that has one of those universal aluminum wings. That in itself is fairly ricey, but the really great part is that he has the airfoil mounted backwards. /rolleyes