Hello and welcome.
My switch recommendation will change depending on your primary use for the keyboard.
Generally speaking:
FPS Gaming: MX Linear (red/black)
Typing: Clicky (blue/green/white)
All Purpose: Tactile non-clicks (brown/clear/grey)
You will also have to pick between which type of switch you want. The most popular switch is Cherry MX. Topre keeps the Rubber Dome like feel, although it is much more refined and the keys will actuate half-way rather than at the bottom of the press. ALPS are less common but are very nice as well.
Within Cherry MX, there are Four stem types:
Clicky (Blue/Green), which I would describe as...initial force required, followed by a sudden collapse. Kind of like pressing your finger through a thin layer of ice. Crisp feel with a high pitched click. Cherry MX uses a two part plastic stem that slaps into itself...more detail upon request.
Soft Click (White), same as green and blue but often a more muted click.
Low tactile (brown), which uses a small bump at midpoint. Similar feel to rubber domes, if you could move the tactility to midpoint rather than at the top.
High tactile (Clear/Grey), larger and more crisp bump than browns
Linear (Black/Red/Grey), smooth press as force increases due spring compression.
Within each stem type, color usually denotes the stock spring that supports the switch.
Light spring: Blue/Brown/Red
Heavy Spring: Green/White/Black
Clear Spring: Clear
Extra Heavy: Grey
Extra Extra Heavy: Superblack (and other exotic switches)
Don't want to overload you with too much so please feel free to post/PM any questions. We've only scratched the surface.
Edit:
Here is a potato pic (before I got my Nikon and Macro Lens) of the common MX switches:

The switch housing for all MX are the same. If you can see the little leg on the stems, that is where the tactility is defined. Red and black are identical, as they both fall under linear (but they have a different spring). Brown has a small bump. Clear has a sharper and larger bump. Blue uses a two-part mechanism to simulate a click, but otherwise has a very similar bump to browns.