I dont own a SSD sadly, But i will buy it in the near future for sure.
Iknow from my friends that an SSD will reduce alot of waiting time in games, Also if you install your windows on your SSD then your OS will restart fast as hell.
For example: my friend restarts his pc in like 25sec ? while on my HDD it takes 5mins.
Another thing is in GTA5 the loading screens in that game are insane, but many people told me that if you instal GTA5 on your SSD it will be alot faster.

Long story short. Always use an SSD if you ask me, + The lifespan of an SSD is way longer then a HDD.