Hey bud. Yeah liquid green stuff is much easier to work with. However it often takes 2 attempts to fill in any serious gaps. I've found that I'll fill in a gap, let it sit overnight and it sort of contracts, requiring another thin layer of liquid green stuff.
However their are some jobs that only regular green stuff will fix. Especially if you are repairing like the ball joint on a guys arm or something.
Anyway good luck!