It's usually a matter of adapting and what you find worth adapting to. I have an Ibanez 5'er I was crazy about, but just found the B wasn't really getting much use in all the bands I was hopping into (it was also uber modern sounding w/ the EMGs in it). It was easier for me to play bigger necks after that, but plenty of basses just didn't sound good enough for me to spend time adapting to the size difference. Used to have a Warwick Corvette and that neck just wasn't worth the hassle, I'd play an Ibanez SR neck and it just felt like home. Since I tend to focus on playing cleanly (I don't pluck or pick very hard), I don't have many issues with skinnier necks or narrow string spacing getting messy when playing. I also do chording so having the strings closer is awful helpful for me to keep from getting hand cramps. Play what enables you to play your best and don't sweat it.