I think it is about immediate gratification as if you reroll, you are going to have to get to around 25+ before you get a sense of your character. That is the downside to the blank slate approach. Until I get my perks squared away, I feel like I am playing some gimped class and not the way I want to play. I know that if I reroll, I am going to have to go through all of that same stuff, just to get back to that point where I get a sense of my character. I love seeing a progression of my character but I think I can see where other people are coming from, I am not entirely sold on coming from a blank slate. Unfortunately, for many people, by the time you reach the point where you do get a sense of your character, difficulty takes a huge hickey and progression by means of itemization becomes stale or dissolves also. It's like, ok I finally feel like I am a Ranger - but - I am one shotting everything and I don't have any upgrades to look forward to or reason to go treasure hunting.
See, and that's the mentality I don't like from the apparent "hardcoe" RPG'ers.
As far as I'm concerned, RPing isn't about treasure hunting and collecting gear, it's about developing a character.
I get a sense of my character from level 1 - as long as I have 2 swords, a piece of heavy armor, and a necromancy spell, I am "in character" - because that's who my character is; a Heavy Armored, Dual Wielding Necromancer. As soon as I get into Riverwood, buy my Raise Zombie spell, along with my Oakflesh spell, and possibly a heal spell, I am "in character". That is the beginning of my character's story, the journey of my character as a young and inexperienced mage / warrior, and the journey of growing and becoming more powerful.
And that's why to me RPG's aren't about numbers, RPG's aren't about treasure. Those things are a -part- of it (and even though Attributes aren't in the game as we know them, numbers still exist in the game in a necessary fashion), but that's not what an RPG is about.
It's about developing a -character-. And a character is more than just skills. A character is morals, values, goals and ambitions, social interactions and relationships, as well as skills and equipment.
Skyrim gives me the freedom to create a -character-, and have full control over all of those elements. Yes, Morrowind and Oblivion did as well, but I feel that Skyrim improves upon that and gives a superior character development system by giving me more choice, more options, more possibilities to make -MY- character different from someone else - even someone who may select the same style archetype as mine.
Like people said, as you leveled in past games, you became more and more like everyone else - you became more and more of a "Jack of All Trades - Master of All", even if that isn't your character vision. In Oblivion, just through natural playing (barely over 100 hours, main quest completed, getting into the meat of the Mage's Guild, and various side quests completed), I watched as my character entered "God mode" because the Attributes that were the focus of my character were all maxed out, and now I had to put Attribute points into -other- Attributes that I -didn't- want.
In Skyrim, as I level my character, he becomes more and more unique. And it doesn't take until level 25 to get a sense of who my character is. I have a sense of who my character is from the very beginning, when I have a vision for him, and I play to that vision.