And don't write to them more often than really needed, since that's the primary reason for SSD wear. One reason why I have the SSD for OS + programs and a HDD for data and folders frequently written to, like tmp
As for games, I can only concur with what was said before, it removed microstuttering in 1.0 and decreased loading times for nearly everything else I tried.
Prices have dropped significantly over the past year, so a SSD isn't that expensive anymore. It's well worth its money.