Can this sign also mean 'regular' or 'standard'?
Yes, this sign is very versatile. Depending on the context of your conversation, it can be translated as 'usual', 'regular', 'standard', 'routine', or 'common'.
Is this the same sign as 'same'?
They are related and use the same 'Y' handshape, but the movement is different. 'Same' typically moves side-to-side to compare two things, while 'usual' uses a continuous circular motion.
Does it matter which direction the circle goes?
Generally, the hands move outward, forward, inward, and back toward you. However, as long as the motion is a flat, horizontal circle, the meaning will be clearly understood by fluent signers.