My answer depends on when I'm asked. A year ago it was a Homewrecker, two years before is was the SC Orange Passion and three years ago is was a Big R WD. Today it's the Cornbred Sin City, pictured below.
I just wish sticks would do well for me. The piece of free birdsnest from the last event is actually doing pretty well, so that’s a good start. My previous one, along with a forest fire digi, didn’t make it more than a few weeks for some reason.
My current favorite is one is the Battlecorals Ultimate Tenuis. I love the pleasant pastel blue tips and turquoise body. But honestly, anything that looks pleasant under whites is a winner for me.
Here's a shot from the site.