Well it's hard to say this is my favorite fish (I learned the hard way that Watchman Gobies aren't always yellow) but it's my only fish, so I try to love it!
2 pictures of the same fish - roughly 2 years apart. Top photo was taken within the last month, bottom photo was in December 2017. We have 2 lightning maroon clowns - this is one that calls a 30 gallon rimless her home. She has a BTA that she defends dutifully. I'll occasionally catch her trying to feed the anemone but I've never seen the anemone actually accept the bits of food.
The other resides in our 120 gallon and is very adept at protecting the entire tank from both my hand and the glass scraper.
They have both darkened significantly - the colors in the images below are actually pretty close to the real colors. I was surprised at how dark both of them have become.