Taking a leaf and borrowing from Amanda
Favourite Airports: Singapore, Changi airport *sigh* Best place ever for a long stop over. Cinema, swimming pool, deck for some fresh air, play areas for small children in all terminals. They don't mind you using their sofas for a nap. Great showers with hairdryer supplied. Massage. Gym. Great coffee and games area plus loads of computers for internet access while waiting. I can happily pass 4 or 5 hours there while flying long haul and changing flights. Beats getting back on the same plane after a 45 minute refuel. Good food also in some of the restuarants.
Heathrow to fly out of, terminal 4. For the Harrods shop alone
Most hated: JFK - That runway is just too short! Plus I hate walking out the doors and the first breath of fresh air I take is so fume filled it chokes me. And that feeling doesn't go till I get away from New York and go up the coast a bit.
Pet peeves:
Too much make up on the air stewards. Yes male air stewards, that means you too

I've never know so much make up on peoples faces as when I fly. Its scary and off putting.
Loos on board a long haul flight after about 6 hours in.
Sitting next to someone who snores.
Sitting next to someone who is wearing perfume or aftershave. When flying long haul, don't do it. It changes up there and is not pleasant to whiff.
Checking in. I hate those long queues. Hence we booked our specific seats for out next trip already. And will do an online check in before we leave.
Worst experience: Can't say I have one that stands out. I guess being stuck in Heathrow for a few hours because my flight was delayed. Or the sitting on the runway for ages when we were supposed to have taken off ages before. O and don't enjoy heavy turbulence at anytime.
Ah ok I do have one. I was flying Amsterdam to Exeter (UK) as I often did but flew a cheaper airline for a change. One of those walk onto the tarmac, see a decent sized plane, go past it and then see your tiny tin thing

It was a bucket with wings

I kid you not. OK so it had 2 engines but it only seated about 8 people and you could see the flight crew behind a little curtain and therefore could see out the window during take off and landing

Also the luggage was visable as it was simply loaded into a small space at the back of the plane. To go to the loo you had to open the loo door and then leave it open so it covered the walkway and clicked in to a catch. So in effect you were peeing in a gangway/rear space of the plane being shared with the luggage

Also we made about 3 stops at small airfields and each time I got a great view

of the landing and take off thanks to the lack of curtain

Also we didn't climb much about 20,000, if that so the ground never seemed that far away.
Don't get me wrong, the trip was fine, uneventful but it really was flying small and basic and I didn't like it.
Tips - When packing for a holiday or long trip, pile everything you want to take on the bed, then halve it down the middle. Take only one half. OK so a few things need to be swapped because I want a particular top, but I replace to the pile only I don't add
Sip water when flying. Don't drink alcohol at all. You'll feel so much better for it after a long haul flight.
Get an inflatable neck pillow. They really do work wonders for a sleep.