Up by 1 because whenever the puck is in the d zone you are absolutely paranoid and have no idea what is going to happen. A goal against is absolutely deflating and inflates the other team (not the fetish), meaning that it can be an absolute deal breaker and decide a game if it gets tied up late. When it is tied it is stressful, but chances at both ends mean something special and it's exciting. down by 1, you are either putting crazy pressure on the other team and it's at least exciting to watch even though it is crazy nerve wracking. When you score when down by 1 it is so elating and picks your entire team up. Same thing when you score while tied. if you score while up by 1 it isn't as elating and the other team can still easily swing momentum

Being down by 1 though definitely creates a unique level of pressure and you really blame yourself if you give up that tying goal