What would be the decisive criteria for you to marry a person?

Theres no way in knowing but let's look at the facts. The divorce rate is higher than successful marriages in this generation. I would tread carefully. Maybe even let that dream of having a family fade away. Nobody wants a broken dysfunctional family.

If we get along extremely well and if I loved him more than anything, experience, if we've been through ups and downs and made it then it would win me over.

Time will show up everything. Isn't about anykind of Criteria.
Condition can be fake. Marriage should be spontaneously happen.
Its responsibillity.

She should support me emotionally and mentally.. And understand me.. Same goes for me to support her

Being together for a long time and things going well between us

Stability, compatibility and commitment.

I don't believe in marriage.

I mean...you should love them...

If he's a Billionaire

yes