Actually, I think keys with shorter travel are better performers for gaming. I play a lot of games that needs precise animation canceling, and I found that keys with shorter travel and a contact point at the bottom of the press gives you the most control and speed.
Also, I found ghosting to be most helpful for one of my games :3 This is because ghosting automatically releases a keypress when another one is pressed with no overlap and no delay - which is incredibly hard to do manually (took me 2 years of almost daily practice to do consistently-of course only then I figured out this cheat

)).
So your typical laptop scissor switches are great! - except they feel like crap.
For most games though, I don't think the type of switch matters as far as player performance goes. I do find clicky switches annoying when recording a game though.