I'm not married so I'm not sure if I'm the perfect one to answer this but personally I ask myself these 2 things:

1. Are we both financially stable?

The two of us must have a decent and stable job first before even considering marriage. Sure some girls likes to be treated as a princess, but the problem I see with only the husband working is that the wife will become too dependent on the husband. When conflicts arises in the future, the wife will be at a complete disadvantage seeing as she has no source of income.

1. Can I stand my partner's flaws and annoying habits?
   Dating is only fun because you two will only be spending a limited amount of time per day. When you two agree to meet on a certain place, you have an ample time to prepare (dress up, shave, fix your hair, etc..) and that's why when you see your partner, he/she is in his best state.

Now compare that to marriage where you two will spend the night and probably spend 24/7 with each other especially on weekends You will see your partner without make-up or even smell his/her breath first things first in the morning. There are also some annoying habits of him/her that you can stand during the dating part but not after living with him/her.

Before considering marriage, one must first think deeply if they really can stand this annoying habits.