Tommy would rather be working, really. He doesn't do...trips. Or the outdoors. Or elaborate vacations. This is why he's not exactly jumping at the chance to visit other worlds at Milliways. And okay, sure, he'll take his kids to Central Park or go on a short getaway with...whoever he's in a serious relationship with, but that's it. In canon, it was mentioned that his wife had wanted to travel and visit foreign countries (and was hoping to do so after he retired), but he just never made the time for it, so I think that just says a lot about him.