Okay, that's cool that the material doesn't seem to matter as far as playability is concerned. I like the look of maple. I also like a clearer sound on the bass and less muffled. More bite, less mud. What do the pro bassists seem to prefer? The bass greats I mean.
I see what you mean now. But bass strings are so thick, your fingers would hardly touch the fretboard, the fretbaord feel doesn't matter as much as for guitars. The back of the neck does matter, for thumb comfort. A sticky back is not nice, especially if you do solo stuff where you go up and down "like kangoorooes in the mating season" (god old Red Dwarf).
Strings also matter, Elixirs are coated with some stuff than makes them less sticky (feels a bit like teflon). Not necesseraly a good thing, as you lost a bit of feel as well (I'm not entranced by mine).
As for fretboards, hard fretboards will give you more attack and articulation. Ebony, Wenge, Maple, Pau Ferro. Then it's mostly a question of looks between all of these.
Fret profile also important, but I can't really comment on which one would be the 'fastest', or good for solo, I don't solo (not good enough anyway). I would think, sharp small profile, and a bass than can have a low action...
All that reminds me of Peavey Cirrus.