I personally don't use it, but I know it is a powerful app and since it can be set up to do many things,, I was wondering what custom thing's users are doing with it.
I'll maybe jump on board as well.
List your favorite things you use Tasker for.
I use it primarily to automate my phone's security.
When I'm home ---> phone connects to home wifi ---> tasker + secure settings turns off my pattern lock; turns bluetooth off and adjusts my volumes
When I leave home ---> phone disconnect from wifi ---> tasker turns my pattern lock back on; turns bluetooth on and adjusts my volumes
When I get in my car ---> phone connect to car's bluetooth ---> tasker + secure settings turns off my pattern lock; turns volumes all the way up
When I leave my car ---> phone disconnects from bluetooth ---> tasker turns my pattern lock back on; adjusts volume
When I get to work ---> phone connects to work wifi ---> tasker + secure settings turns off my pattern lock; turns bluetooth off and turns of vibration mode
When I leave work ---> phone disconnects from wifi ---> tasker turns my pattern lock back on; turns bluetooth back on
For me, this makes my phone secure when i need it to be and insecure when I know I'll be using it. At home, in my car and at work are all times that I have my phone on me and actively using it. I don't need a secure screen so I turn it off automatically with Tasker. When I'm away from any of these places I know I'll have a pattern lock in case I lose my phone. Piece of mind and very easy to set up.
I use tasker for a ton of other things (including quiet hours) but security is my most important use.