Well in a sense you're right. If you ask me why I REALLY like Skyrim? Simple. Because I enjoy wandering beautiful landscapes like the ones it has, being a warrior and looking across the distant highlands, seeing Solitude in the distance, or climbing the ten thousand steps to High Hrothgar and watching the peak of Dragonsreach, tiny in the distant tundra. There was this one especially freaky moment when I was wandering the Reach and LITERALLY felt like William Wallace! Spine-tinglingly awesome!
I stopped doing quests a long time ago. Some argue the main quest wasn't a big deal but the beauty of Sovngarde nearly brought tears into my eyes. Besides, you get to fight Nidhogg in front of the Rainbow Bridge alongside Heimdall (yeah I know the names are switched)!
And for the record, Skyrim is the ONLY TES game I even bother playing (I particularly despise Oblivion and Daggerfall). BTW, I know what you mean by the "class" system in M&B but it would feel nice to have some added bonuses as well as enhancing the RPG, experience if you could formally pick something to specialize in.