Right-handed, meaning chances are my brain's left hemisphere is dominant. However, from all the psychological tests I've taken and just from knowing my own interests (science but art and music too) and such, I'm quite positive my hemishperes are fairly equal.
Here, for those that don't know (and for your discussiony needs, Esus) is a brief explanation of the dominanty stuffs I'm talking about
:
http://www.pierce.ctc.edu/tlink/gene...s_js_hand.html
And here's something I found that gives a few theories about why some people are left-handed.
http://psychology.hypnoticworld.com/...handedness.php