I like mine to be (almost always) short, a smidge below my fingertip, shaped into the 'squoval', not too square and not too oval. Recently I've been wearing darker manicures (Revlon Midnight Affair at the moment...it's my knockoff Chanel Blue Satin), but I like light pinks, nudes, and even just a clear topcoat too. I've never worn acrylics, gel tips, or any of that, and I don't ever plan on it. I've actually been complimented on my nails a lot, and been asked if they were fake, so I lucked out, because they are strong, don't peel, grow quickly, and are a nice shape.
I'm mostly concerned with them being clean, and I hate when people have gunk under their nails. Ick. I love giving myself pedicures, but I tend to space them out quite a bit, my pedi polish is usually pretty beat up before I do them again. I like pinks and reds on my toenails.