Why, what better way to distract yourself from an imminent title than to throw yourself wholeheartedly into one already released?
I purchased Daggerfall a little bit before it was released for free, so I've been playing it off and on since then; great fun, to be honest.
I then bought Redguard, and I must say that for a game that nearly bankrupted them, it has perhaps the best story out of any of them (it's nowhere near as non-linear as the rest, but then again, it wasn't designed to be).
And now I'm returning full-circle to Morrowind, finally having taken the time to get all the texture packs, sky replacers, and shaders I want to work in tandem. Even after all this time, the raw nostalgia and sense of all-encompassing adventure that game brings me is just amazing.
I'm taking a pass on Oblivion for a bit, because it's the most recent and is therefore the one I've played more of in the past couple of years. And while I came very close to finishing Arena some years ago, I haven't gotten up the energy to give it another try.