How do you decide how important something is to you?

I'm thinking about getting a new car, and have it narrowed down to two models I think.

One of them is amazingly beautiful. The aerodynamics lines are gorgeous. The styling is phenomenal. The interior is just as nice. The problem is that the useful space is very limited. The performance is good, but only RWD.

The other's styling just sucks in my opinion. It has a spoiler that is completely ugly, way too big and gaudy. The interior is ugly as far as I'm concerned. That is a first and second impression, but I guess it is possible to grow on you. However, this one has a lot more useable cargo space (including 4 seats). It has great performance (better than the other), including AWD.

So, how do I figure out what is important to me, styling or usability? There are other factors involved that will help weigh the decision, but this is what I am struggling with now.

Thanks.