Most Helpful Guy
Most guys don't care or notice as long as they are not chipped and dirty. You can paint them however you want. Personally I like medium length that are not pointy, and have white tips. I just seem to like those.
Most Helpful Girl
They don't notice or care unless they look gross or their really freakishly long or pointed or something. As long as their maintained in the sense of hygiene and you won't be accidentally scratching them with them, then their fine with it. So really whatever floats your boat in this case.