I hate it, particularly coming up to Christmas. But even at quiet times of the year it's the most infuriating airport I've ever been to.
I'm currently investigating travel to Kuala Lumpur from City airport for our next trip to the in-laws, which would involve changing planes somewhere like Frankfurt or Amsterdam. Surprisingly it wouldn't take much longer when you take into account the long taxi journey to Heathrow and the need to check in 2 hrs before departure, compared to a 15 min (max) journey to City Airport and a 30 min check in. I just need to persuade dh to book well in advance, he tends to leave it to the last minute so we always end up the least popular flights.