First pair I owned was a dark green Nike pair, cotton lined. Then I had a black Nike cotton lined, and a black Adidas with light blue stripes down the sides. Last one was a 'The Gap' reversible (2 nylon layers) pairs light blue on one side, dark blue on the other (they were amazing). But those were when I was young, and unfortunately grew out of.
They went out of style so I didn't have any again for myself until I was an adult, when ebay came in really handy for cheap used pairs.
First one I can remember buying for myself was the pair in my profile photo. Royal blue 3-stripe adidas, cotton-lined. I've since bought too many (30ish). As for what I prefer, usually the classic 3-stripe Adidas, Nike, or sometimes Reebok nylon pants with cotton lining. And of course layering several pairs...