which airline do you prefer?

None of the above. I fly on airlines in the group which get me frequent flyer points so I can use the lounges, sit in better seats and get on the planes first.

Typically I go with an airline where I can earn frequent flier miles, especially if it is a long flight. Though non-stop flight is ideal, I would say a long flight you also want an airline that has good service such as a personal in-flight entertainment system at each seat.

Therefore for me, it would be a combination of 2 and 3 plus an airline that allows me to earn frequent flier miles.

Option 3.

Will not mind if low cost budget airline too has a direct flight

Indian Air Lines

Direct flights

Brand and reputation is the most important consideration. Direct flights preferred, but that isn't always an option.

I prefer low cost direct flight, I always use www.southalltravel.co.uk to booking a flight.

I prefer as few stops as possible and will gladly pay slightly more for certain airlines. I definitely do not choose only by price and avoid budget airlines whenever possible.

2 and 3 for me... I tend to stick to Oneworld airlines anyway (for the frequent flyer points), and they're all pretty good...

All 3, as I only fly Southwest