I was coming off harsh but only responding to what I was reading here and perceiving the situation to be. Of course I could be completely wrong in my perception, but.. It appears that you aren't satisfied with any of the basses you have or had and obsess on finding the "one". What if all the time and effort was spend playing?
If you REALLY want to play well, the path of least resistance may be to get rid of all the basses except one. Get it setup by a competent tech and then play the sh(t out of it every day for 6 months or a year. At that point you will probably know two things, a) if bass is really your thing, and b) if so what bass you really want to own.
You were a bit harsh, but correct and I do plan on learning through it, I had this same obsession with smart phones at one point, trading them all the time trying to find the one that everyone else liked, and doing no research.
I eventually grew tired of that task and just keep what I have now.
I think the biggest thing for me is that I research the wrong stuff till I am blue in the face full of other peoples opinions before I formulate my own.
I find music theory like math, I hated doing it because it never drew me in, I would have rather cheated.
I started playing bass just to get into a hobby, I like music, and I feel drawn to a bass more than any other instrument. I just need the motivation to learn theory and such like that, who knows maybe a personal teacher could spice my mood on learning things up a bit.
I have right now a 4, a 5, and a 6 string.
I plan on keeping all 3, that way I can also dictate how many strings I want to end up with.
I thought that might be a good way to go about that issue as well and just have the three I could end up on and see which is my fancy in the end.