Surprised I hadn't chimed in here before
Here's my '90
Tein Flex suspension, RB big front bar, no rear bar, no A/C, no P/S. FM exhaust with high-flow cat, Kosei K1 with RE-11s, Hard Dog roll bar. Got a few trophies on the shelf but I think the car is better than its driver at this point.
I'll drive this car anywhere. 168,000+ miles and going strong.
My '99 Sport
FM springs, RB big bar, FM axle-back exhaust, Kosei K1TS with cheap Kuhmos. 58,000 mile creampuff garage queen and occasional uncompetitive autocrosser. It's my cruise around town car, top-down year round with a Robbins tonneau cover over the passenger seat.
The wife's '93
Picked this one up for cheap money last year at a junky used car lot. All original rust-free no-P/S no-A/C base model. Haven't done much to it except play catch-up on maintenance. We'll do suspension and exhaust and stuff to make it a decent little STS autocrosser as well as her work-and-back car. Needs a clutch, needs a top, needs paint. It'll all get done, eventually.
Here's the wife flogging the ugly little thing at autocross school back in the spring
The wife's MSM:
2005 Black Mica, FM intercooler and axle-back exhaust. Kosei K1 wheels with Kuhmo XS. Another car we'll drive anywhere and occasionally autocross. I don't drive it much because I'll get in trouble if I do.
We kinda like Miatas. The wife is trying to talk me into picking up an NC but we're pretty much out of parking places as it is (we also have a '10 Mazda3 and a '07 Santa Fe in case it rains). The one-car garage doesn't help, either.
But I digress.