I'm on my first start up right now so I don't have a whole lot of advice, but all I can say is personalities count. In a small environment like that you need t

I'm on my first start up right now so I don't have a whole lot of advice, but all I can say is personalities count. In a small environment like that you need to make sure that you can get along well with everyone there. Get to know the team a little bit and try to spot any red flags. If the team includes a few friends or relatives of the founders, that could be a red flag for nepotism over execution.