Our compressor at the garage is good although it's farking noisy. Does take a while to get decent power after turning it on. Is that normal?
Yes. And consider the running costs of dirty great electric motor than runs for several minutes to power your windy gun to remove 5 wheel nuts. And How clean is the air supply; the compressor at work is mounted upstairs, behind a locked door, and so the air hose could almost be used as a water hose!
Air ratchets? I have a good one(Chicago Pneumatic) that I was given. Having used it a few times, I think it was overpriced; longhandled ratchets are much more useful especially in 1/2" drive.
I can't abide the noise of the air tool itself either. I did see some noise data that suggested that earplugs should always be used when using them as they are far louder than equivalent electric tools.
As far as I'm concerned, the only use for compressed air in the light workshop(trucks are an entirely different matter!) is for spraying. And modern guns are far better suited to small compressors than old ones were.