Trucks, wheel size, deck, etc.
For me trucks determine the range of decks I can run, pop feel, balance point, and stability. If I have Ventures the kicks can't get too steep or setup too long for example, so that's the first set of limits.
Wheels I'm not suuuper particular about shape, but size impacts pop feel and speed. With some trucks shape seems to impact the pinch as well. Changing a deck won't impact this.
Deck is 3rd mostly bc within a range it's easier to fine tune and select things and it gets replaced the most. Trucks are fixed in parameters but if I have options at a shop I can get something more mellow or try something more compact without as much consequence. Small variances in shape impact me a lot less than a change in trucks or when I go from worn wheels that are 50 back to new 54s.