I started wanting a Behringer Neutron. That was delayed by about six months of waiting. In the mean time, I filled an Intellijel 104 case save 3HP. When the Neutron arrived, I just threw it on the pile.
I find Eurorack is about discovering me. The BIGGEST challenge is discovering the way that )I( work... not my modules. For example, I loath menus and secret button presses (hold this while turning that). Temps Utile, O_C, the Disting, and I have a love hate relationship that's more hate than love. So I probably will progress with more modules that have dedicated functionality and more intuitive interfaces, analog, interfaces.
I see in my future a BitBox Ver 1 for sampling and looping, probably a few TipTop drum modules, uBurst, an Eloquencer, a mixer, a boatload of Joranalogue, and another Intellijel case, inverted so the 1U is at the bottom and I can use Quadrats as modulation controls and submixers.