I've already played all of the major games except arena.
Oh you mean after skyrim, of course! I've got characters that need finishing in Daggerfall, Morrowind, and Oblivion.
FYI, you do know that 'Arena' was released for FREE to celebrate the 10th anniversary of 'The Elder Scrolls' series? No reason not to play it now.
http://download.cnet.com/The-Elder-Scrolls-Arena-10th-anniversary-full-install/3000-7539_4-10281566.html
As, for me I've played all 'The Elder Scrolls' games.. I'm split between Morrowind and Daggerfall as the best.. even though when first released Daggerfall was a nightmare due to CTD's, bugs, glitches..