I think it can be seen as a sign of social standing, to the more perceptive lot, hands can tell a fairly in depth story! I personally like hands/nails to be well taken care off but not necessarily painted or decorated. If you are pimpin' out your nails for the express purpose of garnering attention you will need to cater it to the desired demographic. -Which- just means you get to experiment with plenty of colours and designs so have fun with it, be creative... it's art!
Most guys don't pay attention unless the paint is very creative or decorative. I prefer medium-length nails which are square and have white at the end. Nude polish is probable my favorite. I might have a fetish for girls nails.
I get acrylic (because I chew on my nails) and get them short because I can't stand them long. Every time I get them done my boyfriend notices within the first 3 minuets of being around him. My boyfriends best friend will notice if I'm wearing a color I usually don't. My boss will notice to tell me he doesn't like the color. (if it's a red or black or any darker color then nude haha) Some guys don't notice but some guys do, my boyfriend loves to kiss my hands so that's probably why.