When Todd would go on about the Radiant Quests months before release, it sounded interesting, but I didn't know exactly how they were going to be implemented. They came out great! I love how they take you to places you've never been for, but sometimes I feel like the travels are way to far. I've experienced the Radiant Quests after both the completion of the College of Winterhold, and the Companions. Allow me to give a few examples of some Radiant Quests:

After Shock - My Favorite ( most rewarding )
Requirements: Completion of the College of Winterhold
Quest Starter: Tolfdir
Description: So basically, random rifts appear through out the world and it's your job to go to them, kill the magic anomalies and close the portal.
Reward: 1050 gold

Trouble In Skyrim
Requirements: Being in the Companions, not sure if you need to complete the questline or not
Quest Starter: Any of the Leaders
Description: This one is radiant in every way possible, I've done this quest multiple times and everytime I do it it has me do something different, sometimes I'm killing wolves, sometimes I'm killing bandits in a bandit hide out.
Reward: 150 gold ( not so good, right? )

Anyone love Radiant Quests as much as I?