The Elder Scrolls Online is coming and one of the hooks of the franchise is its character customization. Hours can be spent preparing and building characters into whatever the player desires. Many factors can be tweaked to make the perfect archer, mage, or thief. Some versions even allow the player to be infected with vampirism or lycanthropy to become a vampire or a werewolf.
Bethesda has just released a video outlining various possible customizations. Yes, there will be quests to infect your character with the two aforementioned diseases. I am sure that is what you all really wanted to know.
Basically the levelling system is as follows: when you gain a level you gain a point to add to your stats and another point to add to your skills. Attribute (stats) points let you choose whether to increase your health, magika, or stamina. Skill points allow you to learn spells or abilities; using these skills pushes that skill further down its "line". You can then branch ("morph") that ability's skill tree out in some direction. The example given is a friendly restoration skill: at some point you will be allowed to choose whether to heal three (instead of one) allies or have it replenish some of your magika. A common mechanic but, now, one confirmed in the game.
The Elder Scrolls Online is expected to be released this spring for PC, Mac, PS4, and Xbox One.