Ducky DK9008, with Cherry MX blue keys and red backlighting.
Why?
Ducky is reasonably well regarded, I haven't really read of any problems with them.
Cherry MX blue because I do mostly typing (emails and programming mostly), and a little bit (~10%) gaming (mostly Minecraft and Portal).
Red backlighting because, well, partly because that was the only Ducky/MX blue that was in stock at the moment hehe, but because I felt most comfortable with the red lighting.
And how is it, he asked himself?
The keys feel different to the old APC-H4100E that I restored, but nice. I don't always bottom out the keys, and that sometimes causes slight typing errors, as one keypress feels different to the next, but that is just me. The keys are all very consistent, although given the choice I would have put a slightly less stiff spring under the space bar.
The red backlighting on the lowest setting easily suffices to identify the keys, and I would kinda liken it to a keyboard with highly contrasting keys/legends (say dark black on light white) under strong lights. With the lights on, the lowest setting just looks like red printing on black keys. The highest brightness is waaay too bright.
And using it on a Mac, the function keys produce F1, F2, F3 etc. - not sure how to invoke Expose, which is usually F3. FN-F3 increases the volume, as per the Ducky key legend, which was surprising. The calculator key (and email, browser and, er, the other one) in the top right corner do not do anything when pressed by themselves (under Windows they start calc.exe, the default email client and so on).
When I have gotten over the novelty of the new keyboard I might explore a bit more how these keys work and whether there is some way of coaxing extra functionality out of them on a Mac.