Hey, I'll give my opinion, which is what you want, right? I don't have an SSD and I game on my PC.
If you don't like level load time (such as in Skyrim or any open world game), an SSD will speed that up considerably.
It won't have an impact on frames, but may (or may not) affect texture load times (Such as in an Arma game). Texture loading shouldn't affect frame rate, however.
There is a pretty serious problem is your hard disk is consistently a bottleneck in gaming.
What an SSD will do for a game (other than load things faster) is start Windows more quickly. This also means pre-downloaded updates will install faster, and non-game updates will be done sooner (assuming the hard disk is the bottleneck, in updates, it tends to be).
If you are on a laptop, an SSD will improve your battery life (not many people game on battery, but I've had to do it before).
Other than that, I (again, I don't own an SSD) see no other reason to get an SSD.
Hope this helps, even though it wasn't 'definitive'.