Flying is quick, but the time at both ends kills it for shorter trips. I'd rather take the train. I love riding the rails in Europe. It's a very pleasant way to travel.
shinkansen stations are sometimes a bit put there, though not as bad as the airports. Chinese HSR stations are usually way out there, adding to lots of endpoint time, though still not as much as Chinese airports. Europe is pretty ideal, though I’ve had to transfer train stations in Paris before coming off a TGV. Not fun.