What does one look for in a Motherboard?

I am building a pc and im getting help but when i ask about which motherbourd to buy, peope just tell me what to get but I would really like to know what to look for in a motherboud though.

depends on how your going to use the rest of the components, i know one of my #1 priorities is a reliable motherboard, and after than certain quality aspects/connectivity, but you may feel differently.