Skyrim's character types are more versatile than traditional RPG roles. It's really a question of gameplay: what you decide to favor in your style. You can choose to be a warrior who ignores magic but it requires a lot of tactics and strategy. A one-time player is better to focus on versatility: a spell-blade or a thief-illusionist is always better than a specialist.
Once you get the hang of it, it's time to specialize. Wait for your second playthrough or create a short game with a new specialized character. Going through Skyrim's main story and all DLC with a specialist requires a lot of investment. You have to know the game, which enemies you can face and which you must avoid.
I have completed at least 5 complete playthrough and created a dozen specialized builds. I don't go through the whole story with builds because it takes too much time. I prefer a short game with a specialized build: I choose the mods I want and the questlines I want to follow and when I'm done, I move on another character.
The naked rebel was my favorite latest build. A redguard warrior specialized in two-handed. She relies on a Long Hammer and Etheral Fury: she can hit as fast as a dagger thief... With a War Hammer! She's full of limitations and never wears clothes or armor: she goes around naked, relying on her high damage output to kill before getting killed.
Going through the whole storyline with that character would have been painful. But it was great to go venture and see which foes I could take and which would kill me before I did...