At least in the MRT when you wait on the customer service queue they'll sell you a token, as opposed to the damned BTS where you have to wait first if you don't have change, then wait to get the single ticket journey (I'm typically only in town for a couple of days at a time), then again as people figure out which side of the BTS ticket has the arrow. Finding out where the best car is to board the train as its advertisement-covered doors trickle out muddled passengers is ever the hoot. Well, at least it's not as bad as joining the mosh pit of a Transjakarta bus.
Also, considering that the MRT uses a token and the BTS a ticket, transferring (or am I missing an integral fact?) becomes as pointless as trying to jog at night on the north side of Sukhumvit between Soi 3 and Soi 15. Well, that's where the extra car lane comes in handy...