I'm also a loose vintage figure collector. I focus on completing the entire Kenner basic figure line, including the Max Rebo Band. Once in a while I go on a vintage shopping spree. Mostly by the end of the year. I'll need to check my list again for figures I still need in great shape.
I still have a lot of figures from my childhood and luckily I played nice with them, so they're still in great shape, including my very first two figures Luke Skywalker (Bespin Fatigues) and Lando Calrissian (Skiff Guard Disguise).
I'm not necessarily a variant collector, but do have some, like the obvious blond/brown hair Lukes, Jedi Luke with snap cape, but I wasn't looking for them on purpose. Having these did interest me in the variants, though. But you won't see me looking for a DT Vader or a VC Jawa. I just want a complete set of great looking figures.
My focus within my focus is ERGs and Imperial Stormtroopers (in Hoth Battle Gear). I've got about 12-15 (have to recount) of each of them.