I just did a test of the following switches (all stock models):
Linear: Black, Red
Clickies: White, Green, Blue
Tactiles: Grey, Clear, Brown
Reds, as pointed out before, were way to light. Blacks were too stiff IMO, and without any tactile feedback I always end up using more force than is required.
I didn't like the hysteresis of the clicky switches so much, because the finger needs to back off further when releasing the key. Also, it's not great for an audio production facility (my case) were quiet is desirable. But for me the deal breaker here was the fact that this switched is designed in such a way that fingers have to travel longer distances. Still, the blue was my second favourite.
When I tested the tactile switches, I favoured those with a more pronounce bump, so the brown switch got evicted immediately. The grey and the clear seem to have a similar bump, but the grey was too stiff, so I concluded the clear switch was the best for me. Then I did an experiment: I installed the spring from the brown switch in the clear switch. I really like the way this feels. It has the light touch of the brown with a nice big initial bump to prevent accidental key presses and provide definite tactile feedback.
Summary: For me the winner is the Cherry MX Clear with a lighter spring.