I'm a controller with my Commercial SEL. I'd really love to see things from a jumpseat perspective in a lot of aircraft. Unfortunately the kinks still aren't worked out from Sep 11. Pilots can take tours of ATC facilities though. Something simple to remember is that center controllers are much more restricted in separation options than approach controls, even when center is providing approach services.
Controllers are required when an emergency is declared to get your Callsign (easy), Nature of emergency, and pilot desires. These 3 things are required no matter what. Then there is a long list of items that are judgment calls to solicit. Here's where the big problem comes in. When an emergency is declared, tapes will be pulled on the controller for the duration of the emergency. So controllers feel pressured to get all information or face possible consequences if they miss something. Just the other day a regional jet had partial power in one engine.. ATC declared an emergency for them. It was another center that declared the emergency. I receive a call from the center stating the issue, that the CRJ needed no special handling, and that there were XX souls on board and something else I forgot. I wasn't working the radar position at the time, but I told my radar controller everything I was told. The CRJ checks on frequency and immediately gets the same questions... what's wrong... what do you need. A controller covering his butt. Where as it probably should have been handled differently on the check on... Roger, advice me if you need anything. (because the 3 requirements [callsign, nature, pilot desires] were already known).
Speed changes are not automatic. If you need me at 200 kts now, then you needed to ask me about 10-12 miles ago when I was doing 330.
Don't ask me to expedite my descent and then give me a speed reduction. It simply doesn't work that way.
Numerous 1,000-2,000 ft level-offs are annoying for both us and the passengers. We will slow our descents to a minimal rate to avoid all the power changes, level-offs, power changes etc...probably causing you more problems.
Quit giving taxi instructions while I'm doing 120 kts on the rollout....we're a little busy. I will either ignore you or make you repeat it anyway. Wait until we've slowed to taxi speed to give us taxi instruction.
If time allows, we always appreciate "expect" clearances. This allows us to plan our speed, descents, configuration changes, etc... ahead of time. Remember that we're usually flying around with little to no knowledge of what ATC's plan is. Especially at unfamiliar airports. A simple "expect lower in 10 miles" might help me make the decision to keep my speed up or slow to make configuration changes etc... to facilitate the rest of the descent.
Always remember we fly to many many different airports. You are intimately familiar with your airspace and local procedures.......we are not.