I've been wanting to watch a lighthearted anime for a while, the funnier the better! Any ideas?
Try My Bride is a Mermaid and Oh! Edo Rocket.
I will second Hardy's rec of My Bride is a Mermaid and add Squid Girl to the list.
And I'll also throw Poyopoyo into the mix as well. It's a series of shorts about a spherical cat. Crunchyroll has it available for streaming, same with Squid Girl.
I recommend Ninja Nonsense. Hyakko also has a good bit of humor to it as well.
The Devil is a Part-Timer and Baka & Test are two of my favorite comedy-oriented anime :)
High School DXD makes me lmao every night since I've started watching it lol. If you can handle a lot of adult humor it's very worth while to watch, it has other elements to it as well such as the occasional drama (although often the drama includes humor anyway). It's a harem/ecchi setting though so make sure you're into that kind of thing.