How Much RAM Is Too Much

I am running Windows 10 64 bit on an HP Compaq 8200 Elite Small Form Factor with 8 GB RAM. I just learned the max RAM for this computer is 32GB.

Though the computer runs fine as is, I've given some thought to upgrading the RAM. As I do not do any gaming and use the computer in just an 'ordinary' fashion, I'm wondering how much RAM would be overkill. For example, would I see more speed and general overall operating improvement at 16 GB? And even more at 32GB or no?

Thanks