I have an HTC Inspire 4G. And I love it! The extra screen real estate is worth the size!
Apps on my device are:
EMS Notes - I highly recommend this for fast entry of information to then have on your PCR. I've used it several times now, and it works great. We still use paper PCRs, but I am thinking about integrating this data into an ePCR program. It even allows photos to be taken (careful!).
Epocrates - Another "can't live without it" app. I've used Epocrates since PalmOS years ago.
My Asthma Log - This is personal, but a good program.
MyProfiles - Allows me to set multiple profiles, such as Work - Inside, Work - Outside, Sleep Mode, Home, Car.
Scanner Radio - Sometimes, you just want to listen in on other agencies!
Handcent SMS - I like it better than the default SMS app on the device.
And yes, I have the assortment of social apps... not exactly work related, though.
And certs: EMT-B, HazMAT Tech, Microbiologist