I did something very similar. I held off on selling much of my company stock options before the dotcom bubble burst because I was moving to a state with a 2% lower tax rate the next year. I figured it was enough to buy a pretty nice car, but it wound up costing me over $1M.
I still pay attention to tax rates in general, but I make decisions like this based on the correct factors, and then try to optimize for taxes if I can--for example, tax loss harvesting or limiting gains if I'm not selling all shares. I don't let the tax tail wag the whole dog.