... I can appreciate the difficulty in getting opinions from people on this kind of thing.
So, sooo, very true. But, crits do make you so much more aware as an artist of any type.
... Still, I like where you're headed and have no reason to believe the soundtrack will be anything less than addictive. Keep it up. =)
And i'll bet that 100% of the people who first heard the music in the aquaria teaser, after that first time of hearing it, had it stuck in their head. It definitely was stuck in my head. And i can honestly say that i've never heard that track anywhere else before. Or any variation of the other 3. And just 30secs got you hooked! To me, that's a sign of uniqueness in my books.
Soothing and ambiance, like Krissy said, are definitely a must. And synthies like Q said. I think Ian made a good point. If you've listened to some of the ecco tracks, you'll notice that many of them sound as if they fit ecco perfectly. The musical instruments are used to mimic the sounds of a dolphin which was neat. But, I'm already loving the idea of Naija singing and the musical note combinations and all. Should make for some good gameplay. I think that because Naija is a mere-being/humanish that would fit her and the game perfectly. I like the idea of the other worldly vocal sounds too.
I love the Voyage track though. You just gave me eccoitis.

So, anyway.
As long as it sounds absolutely, exactly, perfectly, 100% like Aquaria that'll be fine.

How about Just put those three samples on repeat throughout the whole game and it'll be cool. I agree with Q, more than that and our heads might eXPloDe. @.@