Random thing I was wondering about

Ah man, the biggest question of the year. I'm right handed. Use both hands. Left thumb, right thumb, pointy finger, middlefinger. Depending which finger is where. But in games this is different.

I'm right handed and I use right hand index finger to press space when I'm typing. It's the fastest and most comfortable way in my opinion. When I'm playing games I just left.
When I'm playing games I of course use left thumb since my left hand is on WASD.

Probably both thumbs, depending on what key was pressed before. But can't be sure, keyboard is hidden under the table

The thumb part is simple to answer, as the right spacebar on my split keyboard is now polished through use. XD I'm somewhat mixed-handed, with right-dominance for some tasks and left for others.