There are so many options, it's hard to narrow it down!
In my experience, if you're working with a DAW (rather than a console and tape,) ribbons, and dynamic mics, as well as tube condensers all work really nicely. The cheaper condensers out there tend to be pretty bright, which can be hard to tame in a DAW.
Basically, if you use a mic that has a smooth, unhyped high end, you can add some high shelf during mixing to add 'air' without it getting harsh. if you use a hyped condenser, and find you have to attenuate the highs, you lose the 'air' and get a duller sound overall.
Hope that makes sense, there's a good section about this idea in 'Mixing with your Mind.'
Having said all that, I have a pair of GT44 tube SDC mics that I really like on acoustic guitar, and some vocalists. There's no mic that I'd recommend for all vocalists, though, it really depends on your voice!