For me it’s traefik. It’s took me a while to get it working, but it’s actually really easy now. Setting up container access with labels is very convenient!

Traefik, because I can configure it with labels on my containers and don’t have to deal with the proxy config every time I add a new service.

Used nginx for years but it’s starting to show the signs of its age, same as Apache did a few years before that.

I use NGiNX and have ever since I started. It just works and is easy to configure.