although the actual level cap is 81 I would consider any character past level 50 done especially once you've got all the skill you use to 100.
After that the only way to continue leveling is to grind the other skills or use the oghma infinatum glitch.
Sprugly
yes , i switched from destruction battlemage to a primarily conjuration/illusionist after level 50 to help progression and now I`ve started to pickpocket bandits even though I never considered myself a cheap crook and have over 700 thou septim.
I for one am looking forward to doing some of the major quest lines as a level 81 god-like character who can simply choose not to use abilities that don`t fit his character.
Plans are to get to lvl 81 , then resume main quest with Diplomatic Immunity and when completed , join the Stormcloaks , and finally the Companions.
That still leaves siding with the Empire , the DB , and Thieve`s guild for my next more evil character.
THIS GAME IS AWESOME !