TES 4 is Oblivion. Morrowind is TES 3.
In between Daggerfall and Morrowind you have two kinda spin-off game with Battlespire and Redguard but they don't have a number. So Morrowind complete name is actually "The Elder Scrolls III: Morrowind" (And if battlespire and Redguard were noted 3 and 4, Morrowind would be 5 anyway)
So sure, everyone has different interest, that not a scoop. Even if my first TES was also Daggerfall, I still prefer TES 3. Don't get me wrong, I love Daggerfall. It's huge, and you have even more freedom than in Morrowind. It's also even closer to the paper RPG. However, I've always liked Morrowind better, for it's atmosphere and more regular pace. Even if I remember I was pretty pissed off that you couldn't choose certain special perk anymore at the character creation But anyway it doesn't matter which one you begin with, everybody can like whatever they want. I'm just saying two things :
1) I would like to read an extensive TESO review of a Morrowind-fan, because he's more likely to have the same excpectation as me
2) If you're speaking about the whole serie in your review, you better know your sh*t and not be clueless.