I'm practical enough to never say never, but the airline I like the least, try hard to avoid is LH.

I could tolerate the "service with a frown" ethos, but what I hate is the "do as I say" mentality that permeates their employees.

Example - in a coach aisle seat with barely 30" pitch on an intra-eu flight, I was told off for having my leg in the aisle, even when I moved it to let the cart pass - and then shrieked at when I had my leg in the aisle for just a few seconds while repositioning myself later in the flight.

Example - on a flight with a light load, I was in a middle seat with the window and aisle seats occupied; rows in front and behind were empty. FAs would not let the 3 of us move into those rows. (Note - clearly not a weight/balance issue). The aisle pax tried sitting in the row behind after returning from the bathroom - FAs yelled at him until he moved back.