For me? A nightmare. He isn't my type. Personally, I don't think he works well with woman. On the other hand, I ship kinn HARDCORE! So having him to perhaps, order about, and do as I say. E.g. Dating whoever I say. Then yes, I would love to have him. It'd be a dream come true!
Going by Season 3 Finn, a nightmare. I wouldn't even date him to be honest. I don't know what people see in him other than his looks. Half of the time he's sweet, and the other half he's mean, impulsive, or offensive.