Big Wang Bandit said:85 had a complete suspension setup. Since most people are generally too stupid to drive a sporting car, toyota had to deal with lots of unhappy people who spun their brand new sports cars. So what do they do? make the car handle worse, how do they do that? Take the front swaybar out.
The interior stuff was like the changeover in 89 int he supras, the interior just became nicer.
It was the rear sway bar that was removed, and most 86's still have the mounting for it, just need to add it. They parts are available to add it to other years as well. Toyota put the rear sway bar back in in 1989 for the Supercharged models as well.
Having extensively driven an 86 MR2, 86 Corolla GT-S, and the Supra, I would say the MR2 is a great option for a daily driver! A lot of parts are interchangable with the Corolla, and they're simple to work on, once you figure out how to reach your hand into various places!
Also, fixing damage on them is relatively easy as well, but it depends how bad it is. Stuff like the front rad support is bolted on, which makes it easy to replace, plus if you're in a front-end collision, none of the major mechanical components get damaged.
They have a pretty large interior for 2 people, it feels very wide compared to my AE86 for example, it's pretty nice, though it has an "odd" look to it, and takes some getting used to. The shifter sits pretty high with the gas tank underneath it, and it feels a LOT better if you put a short shift kit in it.
As for all-weather driving, I've driven an MR2 in dry, wet, and snow/ice, and while it has a different feel to it and it's not quite as easy to pinpoint the point when you've gone too far, it is very controllable, and I would not say it is dangerous in any way. Provided you aren't a complete idiot, that is.
All that being said, it's a 20'ish year old car, just like your Supra, they're reliable if maintained, just like any other car, but I would suggest looking elsewhere (ie: newer) for a daily driver that will never let you down. AE101/AE102 Corollas (93-97) are fantastic, unbelievably reliable cars that are downright boring to drive. But they won't let you down!
For what it's worth.
Jeff