Reds and stock clears? No time required, it felt right immediately. Rare, if any bottoming out, ~99% accuracy.
Blacks? I liked pressing individual switches, but couldn't get used to typing on them, until I tried them again after stock clears. You need some muscles in your fingers, you know...
Browns? It was okay from the beginning, but I've never been a fan of that switch.
Blues? Never ever. I hate them with a passion, just like every other clicky switch. MX Blue, buckling spring, complicated white ALPS... I'd tolerate them if and only if muted, with very light springs and soft bottoming out.