>>489530261SSD's are good if you restart a lot, or play only a select few games, and wish to reduce their load times.
They're pretty fast at storing things, and reading the things it stored aswel, but practically, use it as your main HDD with your OS on it, and a few games that you play a lot, it'll save you a few minutes of loading, but that's it.
I imagine SSD's could be really good for servers though, espacially database servers, because all they do is read and write on the hdd.