My favorite springs are the ones in light MX switches, and having tried Topre, I enjoy the 45g Topre better. I do a lot of typing, so it's not feasible to use one of the heavy springs (how do you type on those things?).
Ever come home from a late night at the office and want to just lazily slam press keys? That's when I made friends with Ghost blacks.
Ghost blacks? Blacks with Clear springs?

I'm not really a fan of using much force in my keys, my fingers are usually pretty tired from sports or gaming so it's pretty painful to have to use force there also.