LH,
I'm very very biased about crocs, cuz they cost so darn much!
Here's my 1 cents (not 2, cuz it's so biased!):
I feel it is ultra bling luxury--let it be what it wants to be.
But, tone it down by getting it in a very small size, such as a wallet or clutch or one of the mini bags H makes.
For small bags/items, I luv porosus--the more shine, the better. Don't try to tone down the material, itself--let the bag size/shape do that.
Get a natural color that shows off the "grain" (scales), such as miel, etrusque, cocoan, marron, etc. with gold hardware. Bling away!
You can wear a piece like that causual w/ jeans/white shirt, or with biz suit, or for dress-up.
If you select a wallet such as Kelly long or Bearn, you could probably use it every day as a wallet, and the Kelly long would be a great clutch purse too.
Good luck and have fun thinking about this one.