-Classic looks tend to get me.
-Maple necks and black or dark bodies. Or natural finishes.
-Originality of a bass design. Meaning if it has that awesome, classic Fender headstock, it better be a Fender and not some knock off from a company that put a different degree in the cut and called it their own.
-Saw someone say they like smaller headstocks and bodies. I on the other hand love the larger instruments. Headstocks and bodies both
-Tuners all on the same side.
-I hate the lollipop tuners so clovers for me.
-Black or chrome hardware. Hate gold.
-Knurled and smooth turning control knobs. No grinding or hiccups when adjusting.
-The nut on the input jack on the bass has to be tighter than hell. I hate when my cable is wobbling around.
-The input jack also has to have a tight fit to the cable. Almost like a locking feature. (Not sure if this is something you can get or it happens because of it being a new jack)
-Absolutely have to have a molded hard case. Got a non-molded with the P I just got from a guy and it's driving me crazy.
I know for a fact that there is more. That doesn't even begin to scratch the surface of how crazy I am. I like what I like I guess lol. Hopefully that was the kind of OCDish you were lookin for.