How long have you been drawing (digitally)?
Since 2006!
I started drawing digital art for myself and other people on gaiaonline (an avatar forum community) since 2005-6 starting with MSPaint, and scanned pen drawings that I coloured in Open Canvas. It gave me tons of practice and chances to work on developing my drawing and colouring style. Also, I've always enjoyed seeing people's reactions when they receive art, as it inspires me to continue drawing.
If you're really curious, you can check out my old photobucket account that has tons of old art XD
http://s148.photobucket.com/user/silentsasuke/library/SCAM/ (The "SCAM" stood for Sasu's Chib