Now this is a lovely question!
I guess I'm old fashioned in that still love a nicely oiled walnut finish. Because when you have speakers that look like this: https://tinyurl.com/3m3mtc5e
They need all the help they can get! 
Happy listening.
??? What Is Your Favorite Speaker Finish ???
Just polished up my Rosewood finished Tablette Anniversaries, using some Murphy Wood Cleaner,lamenting my stupidity for selling the Ebony finished versions I had 3 years ago & started thinking about all the speakers I've owned over 55 odd years in this hobby...
Hands down I'm a real wood veneer lover..Give me a stunning Ebony veneer finish with Rosewood my second fav...I will admit though,there was something about those Gloss Orange Heco Aurora's I had that could bring a smile to my face...
How about you?