What is your personal favorite formation thus far?

Now that the game has been out for around 5 months with various updates. What formations have you had the most fun with, as well as success with?

I've been using the 41212(2) as I've been running the 41212 variants since Fifa 12, but I'm looking to spice things up now that I'm running out of higher rater players to use (Excluding legends, Ronaldo, and Messi who I can never afford..) and want to possibly try some wingers out now.

So my question to all of you guys is which formation has been the most fun for you and given you the most success?