I definitely am, on routes I regularly take, I generally know where to stand on the platform to get a seat, and what carriage and what door to be at to exit fastest. On the new air-conned stock on the tube on H&C, District, Met and Circle lines, you have the added benefit of being able to walk through the entire train if necessary, and you can combine your nerd knowledge to assure best seat and fastest off.

I was recently accused by a work colleage of being OCD when he saw me walk through the train just before my stop. It was difficult to deny, but then I was at my desk 10 seconds before he was.