Suitable boy/girl The only way you can find out is by talking to them and knowing them better, in other words (Dating them). You are anyhow going to find out things about him/her after marring them, so why not start with the bit of dating, and bit research (spying) The background; How is the person when he/she is not with you, (coz they are all most wonderful person in the world in front of you and untill you marry them.) "Better safe then sorry"