for store bought DVD's i normally use VLC
mainly because THE DVD MENU WORKS
Smplayer can most of the time run the menu but not always
gmplayer - gnome default really can not
but
getting multimedia ( movies and music AND DVD's ) to work on fedora was ALWAYS a problem
fedora dose not and will NEVER ship with the patent and copyright encumbered software needed
and recently fedora combined repos and the old multimedia repo is DEAD!!! "rpmforge"
your best opting is to use "FedoraForum"
http://fedoraforum.org/
at the top of EVERY PAGE in the CENTER in bold bright yellow is a link to the set up guides
"easy-life" has been around for a long time