Hmmmm, I see a lot of repeat opinions here so let me just add a few more:
1. Anything lighter than MX Clears or MX Blacks is for weak fingered pussies.
2. MX Blue feels and sounds horrible. MX Green, while better, still feels and sounds cheap.
3. 60% boards are unergonomic as soon as you have to do anything that is not on the standard layout.
4. PBT is overrated. I prefer the feel of GMK ABS, especially when slick
5. I have yet to find a beige set that I really liked.
6. There are no good looking backlit compatible keycaps
7. SP translucent doubleshots look horrible
8. Keysets that lack nubs on the F and J keys are stupid
9. Dolch is boring. Classy but boring
10. Beige keysets with grey modifiers looks awful. It's not retro. It's dirty.
11. Backlit only looks good with the right keycaps or when done right. Like I did.