I fly WN exclusively. It's not brand loyalty, it's just that I'm in Baltimore, so they have the most flights and the lowest prices to everywhere I've flown since they became the 800lb gorilla at BWI.

I like WN's luggage policies - two checked bags included with the fare, charges for checked bags over 50lb, no charge for carry-ons. One large carry-on and a 'personal item' permitted per person.

What I don't like is lax enforcement of the carry-on policies, which often results in crowded overhead bins and a lot of gate checking for those at the end of the boarding process. I've seen people get on the plane with a 22" roller, a backpack of equal size, and a shopping bag full of stuff, all of which they cram into the overhead inefficiently without any kind of organization. Flight crews and GAs never say anything to those with too much stuff or oversize stuff.

Still, even with the lax enforcement, the policies combine to make the WN experience pretty workable. Boarding and deplaning generally run pretty efficiently, though there are inevitable delays when a shorter person tries to lift a large bag into the overhead that's too high for them to even see the inside, or some fussy person needs to configure their entire row of seats before stepping out of the aisle.

Charging for a nominal luggage allowance has always smacked of manufactured fees to me. I've never liked the idea of surcharges for things that should be included in the base price, because it inevitably results in people trying to game the system, which tends to cause problems for others when they take up customer service lines to argue why their off-the-wall solution meets the rules. It also causes problems when those who don't use the a la carte services argue that they shouldn't be charged for them, and the billing system is never set up to easily remove the surcharges. So I have always liked the luggage policies on WN, which are simple and easy to follow for most people.