Thanks for the followup, clairebonk!
My treatment of RSUs is similar to the previous posters. All new vestings get sold ASAP. When I receive them, I am taxed at their current market value as if they are salary. The reality is: "My company just gave me a pile of cash, forced me to buy their stock with it, but does not require that I hold onto it." Selling ASAP with no gains or losses has zero impact on my taxes. My tax bracket only matters if I hold them and they have gains or losses when I sell them.
I do give in to the emotional aspect and keep a small chunk (less than 1% of net worth) in company stock. This chunk gets held long-term, and roughly tracks the growth of my stash because the company value has grown slightly faster than the total market. The purpose of this chunk is that if the stock price doubles, I can be happy with every other employee in the office. If the stock price halves, I am not crying with the other employees.