I personally use clear grips simply because I prefer the tacky feel they have compared to colored grips, which feel harder and slicker to me in general. However, it's annoying when I'm using a dark colored ball without much contrast, such as my Special Agent, because I cannot see how it rolls and flares down the lane as well as I could with contrasting colored grips. The Complete NV I saw in the pro shop I frequent was almost entirely blue -- it looked good, but that'd be another case of a ball I'd have trouble seeing how it rolls.