First it's important to define what you mean by "thick" and/or "wide."
To me the thickness of a neck is measured from the front of the fingerboard to the back of the neck.
Width is the distance between the edges of the fingerboard.
Today, people get all bent out of shape over 1/8 of an inch; "this Jazz bass feels great-- narrow and fast!" Then they pick up a modern P bass and say, "it's just too darn thick!" (when they mean wide).
Fender necks (as a baseline) over the past 10-years or so (in general):
- Jazz width 1.5"
- P-bass width 1 5/8"
Thickness is usually the same
"modern 'C' shape."
The same statements in the 70s and early 80s made a little more sense (in general):
- J = 1.5"
- P = 1.75"
Then, the difference being twice as much at 1/4." The thickness of the neck was quite different, with the P usually having more meat to it. Today, you are hard pressed to find a neck as large as you could back then-- I've looked!
Today there are so many different companies with super narrow/thin necks that the baselines get blurred-- what is thick/narrow now?
To answer the OP's question, I like wide, thick necks and 4 strings. Having large hands is probably the main reason. The smaller the neck the more difficult it is for my hands to move around on it-- my fingers just don't have much room to move about comfortably. Compounded by the fact that as I'm getting older, I get to enjoy the challenges of arthritis
Personally, the modern neck shapes I've found to be the most comfortable are on the Stingray (more specifically the Classic models, but the Specials are nice too), and some Rickenbackers (which tend to vary greatly from instrument to instrument).
A few months ago I picked up an Ibanez that looked really nice, but the thing had the narrowest, thinnest neck I've ever encountered! Too bad, because it was super lightweight, had a great candy red finish and the control layout was very nice. Sadly my fingers just got tied in knots trying to play a basic Stax tune.
Boy, that reply was a lot longer than anticipated--

sorry 'bout that!
