Right v. Left

I consider myself left-handed, but sometimes I wonder. I do quite a bit right-handed. Is it a nature vs. nuture thing? I started out doing everything left-handed, but learned things from right-handed people?

Writing - Left.
Writing on chalkboard or whiteboard - Right.
Knitting - Right. (This was taught to me by a righty, so maybe I would have knit left-handed otherwise?)
Bowling - Right.
Batting - Left.
Using knife - Right.
Using scissors - Right.

So weird. Maybe I’m naturally ambidextrous and could learn to do things with either hand? But I definitely feel I use my left hand less, even though I consider myself left handed…