I came to FabFilter for the filteres and stayed for the bread and butter effects.
My favorite is actually the Pro-R. I worked on a dialogue mix and we actually used that for a lot of the rooms in stead of using IR's which is the norm when dealing with dialogue in movies. It is amazing what can be done with it. And it is my go-to 'verb for music.
Agree on the gate. I don't think I have ever found a gate that works in a simmilar satisfactory way as the Pro-G. There may be gates out there that does a just as fine job as the Pro-G, but I am done looking for the perfect gate. I already have it.
What I don't really get my head around is their synths. They aren't really that interesting. And as much as I love Timeless, I tend to just use the stock delays in Logic, although, I have some excellent presets in Timeless 2 that I go to for certain things. The modulation section is quite powerful. Awesome for fateing up vocals.