There were planets the Doctor didn't visit. They were perfectly fine planets, he was sure. Some of them his companions probably would have loved. There was Glashnak, which had maybe, if he was being generous, one third of earths gravity. The entire planet had developed around tourism, made sure that those visiting from other worlds had a good time bouncing around the city states. It had two suns and when the planet was in an equinox, and the suns shone off the waters, it was nearly like the trees back at…
Then there was y'hmBol. Great planet, wonderful people. They'd debate anything. Rassilon, he loved running into y'hmBolians. He'd spent three days once arguing with one over the meaning of the word the. Totally made up for the fact that they were in prison at the time. The red grasses eaten by the y'hmBolians actually changed the color of most species skins to match the red, and most of it was grown around the capital city of… Arcadia.
Ooh, and who could forget Wiythina. It had beautiful, beautiful orange skies, and the mountain ranges were simply incredible… But no. There were planets that the Doctor didn't visit anymore. He didn't mention them to Rose, or Martha, or Donna. Donna would have loved the shops on y'hmBol. He wouldn't mention them to Rory and Amy. The Doctor didn't visit certain planets anymore, but when it was quiet he'd stare at them from orbit and weep.