I've been playing fighting games actively for over 5 years, and know what I am talking about in the games that I play. I've written several character guides for the games Real Bout Fatal Fury 2 and Samurai Shodown 5 Special (Available from the Shoryuken forums and Heavenly Spirits website, respectively). I also play or used to play The Last Blade 2, Street Fighter Alpha 3, Garou: Mark of the Wolves, and Street Fighter 3: Third Strike. Nowadays I mainly play Street Fighter 4 however.
I play SF4 on GFWL as God two nil, maining Dictator. Feel free to invite me to a match.
All frame data used in my SF4 move analysis entries are taken from the frame data charts available on the shoryuken wiki. These are not my own findings.