I have a pretty good gaming PC, but I have a pretty crappy small keyboard which I can still play games with. But should I get a gaming keyboard.
Yes get it. Small keyboard is not great enough for gaming. Find a suitable one or purposely for gaming
If you are going to invest in an expensive keyboard, make sure it is a mechanical keyboard. they last much longer, are much sturdier, and some say they are more satisfying and less fatiguing to type on. functionally they will probably not improve your performance in game
What are you planning to do? Do you need extra keyboard macros in your game? then yes If you don't then you shouldn't need a gaming keyboard but just a standard one that will last you years to come