Getting Open - I find this attribute to be pretty important. It helps with offensive and getting open to create opportunities to score goals. I wanted to build a player who could score. This is a stat I will eventually want to get to 20 if I could.
Puck Handling - Puck handling is obviously important because if you can't handle the puck then your player won't be successful. Puck handling mixed with balance is probably a key to being a top player because you have to be able to stay on your feet and handle the puck. This is an attribute I will get to 19 and eventually 20 hopefully.
Strength - Strength is an attribute I valued early, although I am not sure it has helped. Strength is obviously important to make sure you don't get bullied on the ice.
Offensive Read /D Read- These two attributes seem to be extremely important especially defensive read. Both of these attributes will be brought up to 19 eventually.
Overall I feel like there are a lot of important attributes and you have to be decent in most of them to be an effective player.

(194 words)