If you are a completionist, there's plenty to do and discover. And if you are really a completionist, you'll replay a different character doing different choices than in the previous run (besides, it's more fun than not that the game reacts to and supports your choices and in doing so, supports different playthroughs for different experiences).

Purchased it thanks

Yes, mostly on console. Not exclusive though unfortunately.

Remember, do the DLCs in this order.

Dead Money

Honest Hearts

Old World blues.

Lonesome road.

It's a must for one of the greatest stories.