Basically, I'm right handed. I tend to do most thing with my right hand and/or I'm better at doing most things with my right hand.
There are a good number of things that I can do well with both hands, though.
My left hand is also almost as strong as my right. I have defeated other left-handed people in arm-wrestling, or had a draw, but never really lost. I lost in the right handed ones, but technically left handed people should easily defeat me when going left handed. So that, along with a number of other things show ambidexterity in me at some levels.
However, there are a few thing, although only a few, that I can do slightly or largely better with the left hand instead. Examples include squeezing objects, pressing a button inwards with force, and a few other small thing for slightly better, and things like pressing the frets on a fret-board for largely better.