I know that a lot of Skyrim players prefer to create characters tailor made for each faction as opposed to doing everything with one character. I'm doing this right now with a warrior, thief, assassin and mage with the warrior being the "main" character that will do the main quest and Dragonborn.
For those that like to do this, do you play one character at a time to completion? Or do you play to certain points (like level 25 or the end of a faction quest-line) in the game and switch between characters? Just curious. (I'm debating on whether or not to switch from my warrior to my assassin once I'm done with the Companions or to simply do everything I plan doing with him first before moving on...)