1:15 is my preferred for pour over or Mokkamaster auto-drip. 1:10 for Aeropress when I make that. I think my Breville takes about 15-16g in the portafilter. It actually makes darn near perfect espresso. Great cream and about a 20 second shot.I pretty much use the same ratios, although closer to 1:15 on pour-over.
I'm going to try the 1:1 or 1:2 espresso. What ratio do you use for Americano?