I can use both hands for most things. My writing isn't as good with my left hand, but it's legible. I can eat, type, throw, whatever with my left just as well as with my right.
The only thing I'm better at with my left than my right is snowboarding. I ride goofy, so my left foot controls my motion and where I go. I can ride regular fairly easily, but it feels more natural when I ride goofy.