I don't go through the "dissatisfaction" phase - if I did, I wouldn't have as many instruments as I do. "Desire", yes, and "Research" to make sure I'm not making a horrible mistake. "Purchase" has to happen, and I only do that when I have enough money to buy the instrument, not add to my debt, and "Guilt" has never happened. "Acceptance" follows straight on from "Purchase", and "Relapse" doesn't happen because at this point I've headed back to "desire".
However, what this means is that there has to be a certain level of granularity so I don't think I'm just getting another bass to do exactly the same thing. So I've got a pair of 4-strings, one fretted, one fretless. Sorted. Then I've got 5-strings, one headless fretless, one headless fretted standard scale, one headless fretted multiscale. Um, and one headed fretless with a piezo bridge, one headed fretless without a piezo bridge, one headed fretted with a piezo bridge, one Variax headed fretted, one Warwick headed fretted, and one headed fretted with Bartolini pickups. I think that differentiates them sufficiently.