I've finished all of the main and side quests in regular Oblivion. I'm on SI now, and to be honest, I'm finding it hard to get into it. I've done a couple of the main quests, and explored several caves and dungeons, but I'm finding it difficult to stay excited about playing it more. I don't know why, besides thinking that the characters I'm talking to are just stupid. I know they're all insane, I get that, but besides the new terain, it's offering me very little in terms of enjoyment. Anyone else experience this?

well... it felt like they only had 1 type of cave/dungeon

Nope. Loved the Isles when my character first got there, and the second time. Nowadays however he prefers to roam Cyrodiil′s landscapes

I thought that too many of the quests where just dungeon crawls with a small twist.
It wasn't interesting enough for me too play through more than once.

Yeah, the whole of SI is unsettling; I played through it once and now I rarely go back.

Not me. I suppose SI's quests seem like you're just a "gopher" (go for this, go for that), running errands, but isn't that how most Oblivion's quests were also?
I suppose SI only has two types of dungeons (root caves & ancient ruins), but I actually enjoyed them more than Cyrodiil's caves.

I agree. I feel like a gopher. And I agree about the exploration. I like SI's ruins and caves more