Re: how much knobs is right???
Personally, if I've got 1 pickup (bridge), I like a volume knob. If I've got bridge & neck pickups, I like a 3 way switch & a volume knob. I hate trying to adjust knobs when I'm playing, so I'd rather leave them out altogether. I also like my pickups to be as bright & hot as possible coming from the guitar, and the less soldering points, the better. Least importantly are looks. I can't stand when guitars have 3 or 4 full size knobs, a pickup switch or two, plus mini-switches, like all that sh*t Carvin sticks on their guitars. It looks cluttered and rediculous. A guitar with 1 knob & 1 three way toggle just looks good to me, all function & no bullsh*t, ya know?
However, do you like to darken your tone? Do you like turning down 1 volume knob, and using the switch for on/off effects? Do you like the sound of split or parallel wiring? All the adjustment options are cool if you use them.
What I did to figure out all this was I took the knob off my tone control, and let the pot fall down inside the cavity. I soon realized I didn't miss it, so I took them all off permanently, and haven't looked back since.