What's your favorite speaker finish?

Waterfall Bubinga or Flame Mahogany - depending on the size of speaker and figuring of grain.  Outside of speakers in waterfall bubinga, our kitchen table never ceases to elicit wow responses from all who’ve sat at it with us.  Deep waterfall effect with live edges.  People swear I epoxy coated the table for the depth illusion.  

Blonde Burmese teak
About 26 years ago I was motoring on the Irrawaddy River in Myanmar conducting geologic field work.  We passed a small boat anchored with a man on board furiously pumping what looked to be a bicycle tire pump.  We were told a diver was down trying to salvage large teak logs that had become water logged and sunk.  I took another bite of delicious banana leaf wrapped sticky rice and pondered how difficult life can be.

I like cheap vinyl wrap so they look like a Walmart coffee table.

Depends on the environment, but given a choice, nothing beats natural cherry among the common wood veneers, otherwise, mahogany.