MRT has been my favorite public transport since the first time I traveling abroad. I love MRT more than bus. So..if the city/place I've visited has MRT as their public transport...I always use it.
It's cheap...than taxi off course, more rapid, and avoiding you from traffic jam...

MRT RULES

1. don't eat and drink inside MRT
2. let passengers out first a
3. always give your seat to pregnant woman, kids, and old people 
4. check your belonging before leaving MRT