Today we (with the missus now, who has been staying in Seoul) decide to play tourist at the Korean traditional village near Mt Namsan (where the Seoul TV Tower is). So we catch the subway, naturally. Btw, a traveler should always sample the subway system (if any) wherever he or she is (apart from visiting markets).
The Seoul Metropolitan Subway is one of the most heavily used subway systems in the world. I find it easy to use, clean and very efficient. Price starts at 900 won (US$0.90), but you can normally get anywhere worthwhile in the city area for 1,000 won (US$1.00). Getting the right fare involves studying a huge chart on the wall - if you are lucky, the station names are written in Roman letters.
A subway car has overhead racks for bags and stuff, but you'll normally find newspapers there too. It's for you to read FOC, and when you leave the train, put it back in the rack nicely folded. Well, that's how it works. :-)