So most mr2's would have had a few mods done to them...
I have a decent list, although some might disagree with me :D
 
Useless
-> HKS Turbo timer - yes it has a intended "purpose" i guess, but really its pointless!
By the time you park or drive into the garage, get seat belt off, get out, grab your wallet & phone etc, its fine.
I have checked it works once and then never used it again.
-> Dvd player - why the hell do you need a dvd player in a car unless its in the back to keep the kids quiet
-> O2 gauge connected to stock O2 sensor (narrowband) - i didnt see any value
-> 10inch sub behind each seat - you dont need this much bass, the gain on the amp is turned down to 20% or so,
waste of storage space, one sub would be plenty in such a small cabin
 
Silly and annoying
-> Extreme low Kings springs with original shocks - camber is ridiculous, ride well no comment!
-> Pricey 18inch Italian wheels - offsets were totally wrong, heavy as, too wide, 25mm spacer in rear, could have
bought some nice lightweight 17inch jap wheels for the same $$$
-> Small steering wheel, and hub with no ring for horn contact, 
combined with heavy wheels and no power steering, another no comment! 
-> A pillar dual pod - had too look around it to turn right!
 
Slowly going through the list and fixing things...
Whats on your list???

Had a number of annoying things when I got it,
Huge clip on reversing mirror,
Horrible Wood Grain dash stickers over a lot of bits, took a long time to get off.
Flashing washer squirter's!
Couple of interior neans that flashed with the beat.
Huge EXPLICIT sticker on the windscreen!
Had a cheap electronic boost controller on it that didn't even work, there wasn't even a gauge to say what it was running, it wasn't even installed correctly
It's all gone now. No offence to anyone with this sort of stuff, I just like my car clean, flashy things can be good if done right, this just wasn't even close 

Thats funny, coz i 've installed almost all of the above
 
1 X 10" sub behind the passenger seat i never use now
1 X DVD player + Reversing camera + Sat Nav (it was half price and free install from a competition) <-- i use DVD music videos and 1 DVD can store all of my music in MP3 format which plays fine. and videos only operate (or should operate) when the handbrake is up.
1 X 290mm small steering wheel, fixed the horn about 12months after i installed the horn.
1 X A pillar dual pod, get use to looking around it.
Add to that, as i've almost finished my project.
Dual headlights -- Stupidly expense and barely up half the time.
Boost controller - Barely Crank it up to full boost,
Extra Defi gauges to match the Boost gauge i installed
alarm with a builtin turbo timer which i never use or bother configuring because of what you have mentioned above.
 
But if you look at it in a differing light, i'm happy with what i've made of the car from basic stock form from a long term 15yr project point of view.
 

So why did you guys buy these cars in the first place. haha

The only annoying thing I had was the pod filter, which some previous numbnuts owner saw fit to chop off the original intake pipe and glue to it. Thus, the only way to replace the filter is to replace the entire intake. =_=

air horn...removed
PDAA?? light controls - I can dim my lights from nothing to stock brightness just like mt mood setting lights in the lounge....still there at present
 
 

dj

So why did you guys buy these cars in the first place. haha

Because they got a few things right on mine... :D
Gen3 turbo engine (that wasn't fidded with, stock turbo/ecu/boost), greddy side skirts, greddy intercooler, fgk exhaust, and it was rarely driven (probably due to some of the mods in first post)

darius

1 X DVD player + Reversing camera + Sat Nav (it was half price and free install from a competition) <-- i use DVD music videos and 1 DVD can store all of my music in MP3 format which plays fine. and videos only operate (or should operate) when the handbrake is up.
1 X 290mm small steering wheel, fixed the horn about 12months after i installed the horn.
1 X A pillar dual pod, get use to looking around it.

Actually very good point on the dvd player for storing heaps of mp3's!!, i will burn some this weekend! Thanks!
Steering wheel was actually very nice but with no power steering on mine and the massive wheels it was way too heavy.

Done by Toyota:
An Automatic Transmission - Pretty self explanatory
Chime when going into reverse (I am going backwards so thats a given!)
An automatic transmission
A Factory Sub made out of tissue paper
oh and an automatic transmission
 
Done by previous owner:
Glove box latch was faulty to to hold glove box closed they used a large teck-screw.
Placed a wired remote with glue onto the face of the head-unit, and was then moved to steering column where it restricted movement of wiper stalk.
 
 

dj

So why did you guys buy these cars in the first place. haha

 
haha, good point, biggest thing for me was the price, being a poor uni student doesn't give many options, and I can do all my mechanical work at home so it suited me to clean up