I'm kind of in the same boat as you, in that I don't know what I'm going to like yet. Unfortunately it's hard to predict what you'll like, so eventually you'll have to try everything that seems promising. Or at least I will. That goes for switches, keycap profiles, keycap materials, layout. For me a switch tester just will not tell me if I'm going to like the switch - I need them on a full board and to type on it for awhile. A keyboard meetup is the best place to try out a bunch of different keyboards in a short space of time if you can find one near you. Fortunately there's decent resale value for most stuff on mechmarket, and you see a lot of custom boards there with more exotic switches, or just the switches themselves.
I do really like Pandas and Zealios. To me they do make a difference, even though I'm not a connoiseur. But I still have more stuff to try. Unfortunately for me I have to really discover the "best" for me, instead of just good enough. Fun but expensive and time consuming.
I would recommend trying Blacks, Clears, Zealios, Pandas (although it's linear and I didn't think that would be my bag they actually feel great!), and of course Blues and Greens if you like the click. And then of course Halo True and Halo Clear when they're available hopefully later this year. Personally I'm staying away from Alps and Topre for fear I might like them!
I was worried whether I would like the 60% layout, but it turns out I do so far, which is nice because then for future experimentation everything's a little less expensive and less soldering. I think I would like to have dedicated arrow keys, though, so maybe a WhiteFox or FC660M would be better at some point, but then you have fewer case replacement options.
Enjoy!
