I've already played through Skyrim on the PS3. Now, finally tired of waiting on Bethesda to re-align their fecal matter, I've bought the game and all DLC on the Xbox 360.
While I did enjoy the story and everything about the game the first time around, my new playthrough on the 360 is going to be primarily targeting DLC. I'll probably be putting off a lot of the main quest line in favor of prioritizing the DLC. To that end, I'd like to know when an appropriate time would be to start pursuing the missions associated with each DLC.
Do they each have a minimum level, or a particular place in the larger story? Or are they fairly well separated from the main story, and level down or up to match the player? Could I dive straight into things, right out of Helgen - or do I need to buff up a bit and slay a few dragons, giants, mammoths, etc. first?
I would like an answer to cover all of: