I had one with blues, I liked it a lot, but then I traded it for one with reds and I like it even better :-)
Because there's no metal plate, the board resonates sound more so I thought the blue switches were a bit too noisy, especially the space bar (green, heavier switch). Perhaps the blues are better suited for a more solid board, although some people like the softer feeling of blues on PCB mounted keyboards.
At the end of the day it boils to personal preference. Both switches are good!
I intend to use the Poker as a portable keyboard, so reds is a better choice if you're in a conference room with other folks.