I've got one. I wasn't too fussed with the factory pre-set patches, though there were a couple that I kept. Most of my patches are designed from the ground up by me. I basically categorise them into "musical" patches, and "non-musical".
For "musical patches", I've currently got 2 very good Auto Wha patches (one for fingerstyle and a different one for slapping), a chorusy patch, an overdrive which I modelled on my sansamp, a patch for using a pick, patch for octave down, a fretless simulation patch, and a patch which is a combination of octave up effect and reverb that almost sounds like a string section when I play high notes. I use this for example to replicate the cello's in the introduction of "Shimmer" by fuel.
Non-musical patches..... well they're pretty useless, but they're fun..