It's probably overkill unless you also do a lot of productivity stuff. That being said, RAM has gotten so inexpensive lately that it doesn't even really matter if it's overkill. There's not much risk when good 16 GB of RAM can be acquired for $65 instead of $165.
I do not do much stuff apart from game and go on internet at the same time but read couple of things online it wont make much of difference just needed to change my mind into not wasting more money!