Hi,
Been on all three as well, a few times, and have some booked now. Our preference is the Radiance. DH will say it's because they have Shaq's chicken! LOL!!!! We prefer smaller ships but the Radiance is a happy medium and has a lot of food choices. I agree about the Panorama doing the longer itineraries and that's a big plus but it has a much bigger feel. The buffet on the Panorama is TINY and not good. The Miracle is kinda funky with the comedy club and the dance club located on the lowest deck, along with the OV rooms. You also have to walk through the smoky casino to get to the front on that deck. We're gamblers so we're used to it but we didn't like it when we had our kids with us.
All of them have been good trips though. We just prefer the Radiance.
Tina