Cobbles said:
Go by train - hang around on 3 platforms.
Go by plane, no need to change.
No contest.
Go by plane:
Arrive at airport after travelling for more than an hour from the city you work or live in, on account of the airport being miles away from anywhere.
Find screen that tells you were to check in.
Walk a quarter of a mile to right check in desk.
Wait 10-20 minuts to check in.
Present paperwork and passport. Get asked stupid security questions.
After checking in, find departure gate.
Spend 20 minutes queuing to clear security. Hot. Bothered. Be asked 100 times whether you're carrying any liquids and offered bags to put them in.
Remove belt and shoes as you go through security.
Walk (in practically all cases at UK airports) into a depressing, ugly as fuck, crammed hall with few windows and no view to the outside world, little natural light, tacky carpets, thousands of hot and bothered travellers sitting wherever they can and every last inch of available space taken up by shops, shops and more shops selling overpriced shite that is actually more expensive than in the high street, "duty free prices" or not.
Try to find somewhere decent to eat. Desist due to the lack thereof. Spend 15 minutes deciding whether Garfunkels or McDonalds are the lesser of two evils.
Flight is delayed. Try to find somewhere to sit after crap meal. Think you'd have been well into your journey for hours if you'd taken the train, comfortably reading at your seat or taking a stroll to the bar/restaurant coach.
Once the gate is finally asigned, locate the route to it avoiding the women offering shots of Baileys and the young men wanting you to buy a ticket for the chance win a Ferrari.
Walk for 15 minutes through endless corridors.
Find passport and boarding card again when you get to the gate.
Sit and wait for the announcement to board.
Watch in despair and contempt for the human race as fellow travellers vulture around the gate entrance jockeying for position.
Show passport and boarding card again.
Queue for another couple of minutes on the jetway.
Show boarding card again.
Queue patiently as passengers in front of you put their luggage on the overhead bins.
Take your seat and watch the scheduled departure time pass as the plane waits for the inevitable tosser who's enjoying his drink at the terminal's pub.
Finally, start taxiing towards the runway.
If you really think waiting at three platforms is worse than 99% of all air travel experiences, my guess is that you have not flown much (or possess your very own private jet).