I prefer NO clip, since I carry my EDC (currently BM Griptilian drop-point for light carry at the office, or a large Timberline Wortac when I'm not at work) in my pocket. I stopped clipping my knives because the clips are pretty hard on the dress pants that I wear to work and eventually I just removed all my folder clips. And guess what? Every folder that I have ever owned has felt better in my hand without the clip, sometimes (like the Wortac) significantly better. Clip design must be an afterthought on most folders since the ergonomics of many knives really suffer when the clip is added.
miguel