good question. Yea I have changed. I've been so comfortable with Oblivion & Cyrodiil over these past few years; after awhile my characters pretty much always know what they'll have to do to survive. There's a "comfort zone" whenever I play Oblivion (and I picked up an OB game last nite). Even though I'm a dead is dead player, I know how to work Oblivion's system so well at this point that death is not really at my character's door very often.
Skyrim changed all this. I and my current character Thor a'Zyyne, who is a male Nord barbarian who doesnt' use spells at all, literally have no idea what's around that turn or what's behind that grove of trees. Skyrim feels a heck of a lot more dangerous, even at lower levels.
Matter of fact, my first character (Blade 'n' Bone, another Nord barbarian) already died after just 2 days of gameplay. Killed by a couple bandits, which is virtually unheard of in any of my Oblivion games. Just goes to show you really gotta pay attention to EVERYTHING.
Even going in cities is different in Skyrim. NPCs don't just say random misnomers all the time, a potential quest or roleplay moment or even a fight could ensue at any time. No more brushing by NPCs with half-an-ear in iggy mode.