Commuted to Madrid every two weeks for last two years. Spent many unhappy hours drifting round the countryside in CAVOK, no other a/c in sight, then zillion mile finals to the vast, empty wastes of Barajas with a choice of two ginormous, comically underused, parallels. All followed, frequently, by epic taxi-ins because landed on the wrong parallel for the terminal. At least at T1 you get out of the place sharpish, at shiny new T4 you park your life for about 90min before you're on the road.
Great city, wonderful country, absolutely charming people - with an awful, socially parisitic, ATC service.