Most of my travels tend to be alone and i can't imagine myself given a Middle,Lower berth......Upper berth tends to be a lesser evil but the rest two especially the middle berth is a nightmare.I like a window so upper berth,well i am not very fond of but i guess getting a side upper or upper is one of the easiest things to do.So just to be sure that i get a Side Lower and being an ardent ticket collector.......don't know why? :D I tend to painstakingly stand in the queue and wait for my turn......to make pretty sure i get a 'Side Lower'.The success rate is pretty good since 90% of the time,i get myself a side lower......but standing in the queue at the station is horrible but then there is a small satisfaction when you end up getting a Side lower. :)
But...
more... Side Lower has it's own drawbacks but still i would say that's the best place in the house. :D