I'd expect everyone's main goal is to have fun. Considering this is vintage I don't think anyone is grinding it for planeswalker points. The thing is that everyone's idea of what is fun is very different. For a spike doing well and having fun are synonymous! But there's lots of other people who just like playing their pet deck, or doing something wacky. So everyone's goals are likely based on that. I think the key is to set realistic goals though. If you do in expecting to make top 8 there's a very good chance you leave disappointed.
Personally my goals are to go better than .500, not make any giant punts, and drink some beer afterwards. I also find that I hate playing slow, grindy decks at longer tournaments because I get sick of playing magic by about round 5. So I'm just gonna slam shops and see how it goes.