Only losers can't press MX blacks. They're lightweight with about the same force needed as a standard rubber dome keyboard.
I've used MX black, green, blue, brown and red. My two favorites are black and red.
I'd recommend MX black for keyboards with Costar stabilizers and MX red for keyboards with Cherry stabilizers.
I prefer blacks since they provide slightly more force than reds which is helpful for reducing the probability of accidentally pressing keys.
I prefer MX reds for boards with Cherry stabilizers because those stabilizers add some force to the keys, making the modifiers stiffer.
What is awesome about MX blacks is how they get smoother over time. There really isn't much perceivable difference between reds and blacks. Blacks just feel a little bit firmer which makes them feel better. It's like closing a door to a luxury car versus a piece of junk. Reds are a little bit limp feeling in comparison, but the only negative effect that has is increasing the probability of pressing keys accidentally. Reds do allow slightly faster key presses, but only if you're spamming a key VERY fast, which you likely won't ever do unless mad.
Of all the MX key switches black is my favorite for gaming. No tactility or reset points to worry about. No distracting clicks. I used a Filco TKL Multicam with blacks for a while. Probably one of the best boards for gaming. I just switched to a Poker II with reds since it has Cherry stabilizers. I wish it had a bit more force in the non-stabilized keys. Maybe I'll mod them to blacks later.
Oh, about my "only losers can't press MX blacks" line: People who can't press them have weak hands and therefor weak handshakes, which make people question their integrity, which leads to a lack of friends/jobs/etc. and loserdom.
