About to get a Senton 3s BXL in the mail. Wanted to know some of the common upgrades!

I already have a Fast Eddy bearing set in the mail as I've heard the steering rack only uses bushings.

What are some common "upgrades"? I mean real upgrades, not just a metal shock tower to have a metal shock tower.

Shocks? Tires? Hex Adapters? etc.

Thanks!