I should note that by far my most comfortable bass to hold/play, lightest, easiest to play, with super responsive awesomeness is my cheapo entry level early 2000s SR300.
Why don't I play it all the time?
I prefer my 6 string - but not in the aspects listed above... in every other way though. I dislike how easy it is to bend the neck on my soundgear while playing - with low action you can easily fret it out with some small neck pulls that I, apparently, tend to do a lot, and only affect things on basses with very flexible necks, like the old sr300 I have. So I have to be careful when I play it. Partly cuz it's SO light and fun to play that I tend to jump around and move it around more than my big, comparatively heavy (10lb), 6 string.
But I mean, seriously - if possible I would want this bass:
soundgear lightness, shape, comfort, punchyness, balance, size, scale length (34")
fancy wood finish (the recent trend to sexy body wood with even sexier top wood and the curved edges showing each in transition... I want that)... but again still super light weight and punchy like my sr300.
6 string
NECK THROUGH
and there ya go. Build me that and I will be happy. Oh, and like I have to be able to afford it LoL. Small caveat, there.