Hi Maledicted,
So far I've used only browns with my former Logitech G710+ and now RoamerG on the Logitech G810 which are kinda similar (tactile).
For the custom one I would want to try linears, either cherry reds or blacks or counterparts from other companies (the clicky ones do not appeal at all, don't want to get banned on discord LOL).
For the size, I'm not sure but I think I will go with the 65% one although the availability options could be limited for the PCB and case when comparing with a 60% but I think I want to keep the arrows + those 2 or 3 extra keys (DEL etc.).
I think the first step I should get a switch tester as you suggested to test them all or most of them.
Thank you!
Clickies don't appeal yet, they might once you've got a tester.
Do you want linears for typing, gaming, multipurpose? I think a lot of people agree that MX reds are just a bit too light for their liking, and that blacks are just a bit too heavy (for some reason heavy linears seem to cause more fatigue than switches of other types in a similar weightings). It seems to me that Gateron yellows are a nice compromise, and I think a lot of people will agree that they're much smoother than Cherry linears. A lot of people also find that they don't particularly like linears for extended typing, although plenty of people must feel the opposite as well with all of the fancy boutique linears out there now. You may also like Kailh's box linears and tactiles, and Gateron's tactiles (all switches I have tried in these specific subsets are much smoother than MX).
Novelkeys Creams, Gateron Ink, Zeal's switches, Halo switches, and Panda switches seem to be the most popular around for linears and tactiles, if you wanted somewhere specifically to look. I know a good chunk of tactile people also end up with Topre. All things to research and maybe get samples of.
If you do end up wanting to give clickies a shot, find a tester with Kailh box jades in it and/or other box clickbar switches. You'll have a hard time finding a tester with everything. My 130 switch tester just finally came in. It has 0 of the popular boutique switches I listed above, so I have, unfortunately, never tried them for myself.
You can configure some 60% boards to have arrow keys. That's what I'll do with my DZ60. Then you've got more options in cases. I'm going with walnut myself.