relatively knew but I want to know the best place for combos, hitbox info, tier lists, matchups, etc.
If your new, SRK, if you just want the raw data then the Wikia is easier, but i prefer srk.
If you want to see the properities of the different normals etc, look in the wiki e.g.: http://wiki.shoryuken.com/Super_Street_Fighter_IV_AE/Ryu
You can find combos and matchup threads in the specific subforum for the character e.g.: http://shoryuken.com/forum/index.php?forums/ryu.23/ (Read the stickies)
There is also information on:
Regarding videos you can check here:
in the character forums.
That´s just for a start, you see there is a lot of information floating around and that´s just the tip of the iceberg. Don´t waste your time opening a thread if you can find information like this in a second ;]