First of all, it depends on the girl's body. If she has fat legs, she's not going to look great (to most people) in tight pants, shorts, or a dress, but maybe boot cut jeans would make her look good. If she has long, slender legs or athletic legs, I guess it's a matter of what style you prefer. I like sophisticated, dressy clothes, so I think I look hottest in a mid-thigh-length skirt or dress. But if you're a gym rat, maybe you think spandex shorts look better. Tight jeans look hot, too, on thin people, but I see way too many fat women trying to squeeze into them and it's gross.
Tights and leggins are not really a bottom clothning. You always have to wear something on them.
I mean skirts and dresses are the most feminine and love how girls look in them but if a girl has nice legs she can rock just about anything :3 tight jeans & pants, shorts and sweatpants are hot too! What is there not to like in a womans legs!