I play all my guitars on a rotating basis, but if I had to pick one, it would be the white one in this picture:
The robin's egg blue one is a VERY close second, only because it has just one pickup and the pickup is a Custom Custom, which I like, but is not my fave...
The reason this is my favorite is that:
1.) I absolutely love the neck profile on certain Charvel Custom Shop Music Zoo models - the easiest way to explain it is that it is the Music Zoo Nitro Relic profile. Fatter than "normal" generic Custom Shop Charvel necks, with a 1 3/4" nut width and 21 frets. These necks are like an old friend to my hands. The blue one (and another custom shop I just got and is being painted) have the same neck. I also LOVE the look of birdseye maple, one piece necks...
2.) This guitar sounds great and has versatility - My favorite combo of pickups - Super Distortion bridge and Humbucker from Hell neck. Lots of great tones from these pickups and just a couple of great slabs of wood (alder body and maple neck).
Now, as I said, I just got something from the Charvel Custom shop that I ordered almost two years ago that is with Dan Lawrence for a paint scheme that the Charvel Custom Shop won't do anymore due to trademark issues. That guitar will have a NOS Holdsworth pickup in it and may very well end up being my new number one... Time will tell and I'll post pics here when I get the guitar back in a few weeks...
Steve