I am using a power grip about 75-80 percent of the time, and use my putters for most shots under 280. If I want a stronger fade, I'll fan grip it because it gives the disc less spin, and I'll fan grip for touch shots under 100.
It was really nice out today so I took some wizards out for field practice. The warm weather was giving the discs extra glide that I haven't seen in months, and some of my drives were getting out around 350. It was F'n nuts, I love putters.