Pretty much the same here. My taste changes quite a bit, besides, it's hard to pick just one car to do it all. But currently, I'm into slightly quirky, large and luxurious, yet at the same time inconspicuous and, relatively speaking, pretty mundane looking. And if possible, with a petrol engine and a manual gearbox.
Okay, I wrote that because there's a nice burgundy/red wine coloured first-generation Volvo S80 in my town, complete with a beige leather interior and a manual gearbox that I fancy a lot, and it seems to be in quite nice condition. It's not for sale or anything, but for some reason, I'm really starting to appreciate such cars. Also, I'm quite into Swedish cars from 90s, as much as they were nothing special compared to their predecessors.
But then, if I had to (and by that I mean like if I were really forced to) have just one car for the rest of my life, I think I'd pick the Porsche 944. No, it's not a reasonable choice. Nor is it an absolute winner in any category, apart from maybe looks, which is, again, highly subjective. The biggest dilemma would be Turbo vs S2. I do want teledials, but I also want the normally aspirated engine.
I also have a list of cars (in my head) that would be equally as good, maybe even better, or almost as good. Amongst them are a mint Mazda MX-5 (NA), BMW 320is (E30), various Lotuses, any pre-997 base-model 911, the previous-generation Fiesta ST (the only one sold in North America), Ferrari 355 Berlinetta, Honda Beat, Renault Sport Clio 182, and many more. Heck, these are just some that first came to my mind. And as I said, it'd be really tough to pick just one car to do it all. Either a small collection of cars would be preferred, or changing the car every once in a while.
EDIT: I just noticed that today's 29th of November, not 19th. Whoops.
If only you knew how many threads have been started to explore the "dream garage" of 2 cars, 3 cars, 3 cars from 1978-1984, 2 cars and 2 motorcycles...
There is no way most of us could narrow it down to one, single dream car. I think this forum, more than most groups, has a good appreciation for a variety of cars for what they are. I would love a 288 GTO because I loved the 1:18 scale model I had as a kid, but I would also love a 1990s Land Cruiser.