im not sure if this has been discussed before but ill just risk it
i hav been playing the main quest for the firt time in a long long time in oblivion and ran across some of the deadric quests when it struck me that shivering isles is more or less a missed oppertunity there are 15 deadric lords yet shivering isles only gives us one to play with
personally i think bethesda could have given us more more deadric lords to quest for and more diverse realms to go in to
i enjoyed the main quest of shivering isle and sheogorath was a laugh ( brain pie ! ) but i felt it was a bit too short and insubstantial
the knights of the nine add on is alsoa bit insubstantial
what dissapointed me the most about shiveirng isles apart from its length and only one daedric lord present was that the shivering isles looked rather normal i expected something complelelty insane twisted and chaotic to represent sheogoraths state of mind instead it looked like an extension of cyrodill with new creatures
i understand that most expansion packs dont wildly chance the grahics but it was somewhat dissapointing i expected something along the lines of american mcgee's alice

still maybe we wil be thrown for aloop in tes 5 and get to serve some daedric lords

You must keep in mind that SI was quite a big expansion and took long to develop. Seeing as game developers are greedy and only want our money it makes sense that they rather release the different deadra lord's realms one at a time, it brings in more money.

But on to the topic of the realm itself, it was really quite normal, only that the one part is colourful and the other misty and gloomy. And the creatures were quite irritating, I hate walking into water and suddenly coming across a Scalon, then you have to wait for it to pounce before you can hit it.

Some of the daedric Reams could be difficult to make. Like the Realm of Hermaeus Mora, which would be anendless Library with Books with no Covers, containing all the forbidden Knowledge in the World. There are some Ghosts floating around, endlessly seeking that knowledge.

That would be quite boring after awhile

Azuras Realm could be nice. With nice Flowers everywhere, sparkling Waterfalls and a big city made out of Silver...

Nocturnals Realm could be that what bluekatt was looking for. Nocturnals Realm is the World of Nightmares. This could be quite funny. Oblivion could become a "lucide Dream Simulator"

Well, just look at the "Beetlejuice" Movie and the Shows, this would give you some Idea how Nocturnals World could look like =)

I agree to an extent, that SI could have tackled Sheogorath a bit better. For one, I kinda felt a little disappointed when I finally met him as this old guy in colourful clothing who couldn't quite focus. Reminds me of a teacher I had. Anyway, the mystery of a disembodied voice and an insane task works a lot better for the Daedric Princes. I hope Bethesda abandons the idea of meeting Daedric Princes altogether, it's such a downer. As for the landscape, it was fine enough and differed enough to be worthwhile, but I felt like the two or three little towns present had exceptionally few quests that didn't already tie in with the main strand. That kind of sucked since my favourite type of quests are the freeforms you discover on your own in the wild. Needless to say I wasted hours on what turned out to be pointless exploration. Some of the new weapons, however, were excellent (Wabbajack, Dawn Sword/Dusk Sword). I felt like the whole of TES IV + SI could have used more worthwhile loot i.e. weapons/armours with more than just a boosted enchantment-- More items with supremely unique effects like the Gray Cowl. Not like Umaril's Sword with decent, but ultimately banal enchantments.

Oblivion could have definitely used another expansion, but I think Bethesda painted themselves into a corner specifically with the voiced dialogue. It's probably too costly to keep hiring talent to perform new voicework for a simple expansion.

More than any Daedric realm, I'd like to visit Akavir already in my lifetime. Here's to the future.

There's only so much that can be done within the game as it is. It's not an engine which can handle many unusual effects. I would also suspect that some laws of physics are required for anyone to exist in that realm. But yeah, they could have gotten a bit more creative at parts. After about the 3rd or 4th quest it seems like they ran out of good ideas. But that's what they get for having some sort of unifying main quest.

But that's kinda why I'm doing the mod I am right now. I wanted to make a large Daedra based mod which took things a different way. Meridia seemed like a good choice since there's hardly anything known about her. I can be creative without stepping on anyones toes. An area filled with criminals and a bottomless pit which people have to trek down... You got it. A system of frozen canyons filled with hostile beasts... A swamp where two peoples are in constant conflict... A large canal city sorrounded by water... An underlying theme of magic, balance, and deception... Just good stuff.

also Remeber that the game engine worked, and bethsada was smart enough not to totally change everything. Granted it wasn't my picture of madness, but well.........
Anyway, we could go on about the bad stuff in shivering isles, but i spent money on it and i am not gonna try to make myslef feel like i wasted money on a great, but not perfect expansion. I think it was great.

I'm grateful for its release, but honestly the modding community seems more ambitious with SI than Bethesda.

The only thing that bugs me about SI is that there's no OOO support as of yet, and I would've rather seen an extension of the main quest or something related to Cyrodil. Other than that, I felt it's very good: gives you a lot of variety in terms of scenery and its really wacky. That said, it's still got any problems the original Oblivion had, but it doesn't detract from the fact that it's a good expansion. Just my 2 cents.