I don't really have a particular moment that I can say was my 'happiest', but I would say the time in 2009 where I finally got a "gaming computer" that could play games like Garry's Mod was a great time. Recently, getting my Bachelor's Degree was probably my best moment.
when i got into sgdq and was about to go on stage for my run wasn't happy after the run, but at least i was happy before it
As bad as it is, this situation let me get back into gaming. The time freed up from not having to commute or work has let me make more connections online. I play TTT everyday, voice chat with my college mates, and just recently joined an MC Realm. Obviously I'm hoping my job starts back up, but it's not too pressing so I'm still having a good time.