A few different reasons really. I wanted a Supra or a Mitsubishi Evolution VII at the time but the evo was a bit more expensive and had less power so went with the Supra.
I owned the car for about 5 years and when I got it the car had just been repainted to black from silver, a couple of months down the line you saw what a crap job they did especially not masking around the windows. Fuel was expensive but not such a huge deal as I was able to borrow a car for work stuff when I had to travel, which was lucky as the one time I checked the MPG it was 17.5mpg, but there was always something that needed fixing, gearbox, suspension and all the other bits that come with owning a 22 year old car.
Just before I sold it I paid out £2600 for a full respray and those are the pictures are from the day I had it back. I went round every inch of the car checking the paint and wasn't completely happy with it even though I had them take all the windows out, replace seals etc. I could have had bits tidied up but would never be as I wanted it and that was it, I pretty much decided to sell it right then, I was just done.
However,what a monster it accelerated like nothing I have ever driven, the sounds of the turbos, dump valve and the look of the car itself was incredible. It put me in the poor house a bit but I don't regret for one second driving the car I always wanted and would love to get another ideally in metallic grey with similar bodykit.
As for the Celica, I had owned a gen 6 before the supra and liked it a lot although it could have done with air conditioning. With selling the supra I was able to clear a good chunk of debt and the choice was for me between a previous generation MR2 but that was a bit old and then I saw my Celica come up which wasn't too old, the gunmental grey colour I wanted and had a few styling tweaks.
When I got the car I absolutely hated it, really slow (which I was expecting) but not to be that slow. After asking a few questions on this forum the guys pointed me in the right direction, diagnosed an issue with the air filter and fixed the VVTI and it's back where it should be now I'm a lot happier with the car now, everything pretty much works on it and no more crap paint! It's a good compromise between fun, looks and cost.