New Roadhog, First Hog

Hello All,
I have just ordered a brand new Roadhog for a 500+ person Live and DJ room.
What do you know now that you wish you knew then with your first?
Efficiency, Tips and Tricks, a better understanding?

I'm new to the game with very little console knowledge, yet extensive Light Jockey 2, LJ Touch and LJFaders experience.
I will be receiving a day of training with my purchase but a day is never enough.
Thank you all in advance and good to see a great support forum.
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