I'd said in a similar thread that I've always use my pinky in playing but I seem to have a physical 'defect' that to do '1-3-4' ascending stuff when playing lead/scales stuff. I can do '1-2-4' easily and I can do descending or pull off '1-3-4's all day long too. No mater how much practice, my pinky does this locked, uncoordinated thing that even when I spent huge chunks of drills over months, never got really any better. If I really need to '1-3-4', I use the ring finger for the '4'.

Otherwise, I use my pinky all the time. Seems unnatural not too.