I played Morrowind for about 200 hours in total, and sadly never came close to finishing the main quest. Not because I was intentionally trying to avoid it, but because I just never got around to it. The length of an Elder Scrolls game is not just about finishing the main quest, but all the stuff there is to do on the way. Morrowind had a lot.
I think Skyrim and Morrowind are better than Oblivion, but it is still a great game, and worth picking up. I am not sure most people who have not played Morrowind before now could even play it, the combat system is just horrible compared to Skyrim, and even Oblivion.