How do you figure out what you really want?

Today I realized that 'reason' is what gives people a drive to go forward. But what happens when you have no reason? Or maybe a bigger problem is that you have too many conflicting reasons?

I guess this comes back to my major dilemma in life, that I don't know what I want. And I'm not sure how to determine it.
Sometimes I want to be someone like Mother Teresa - going around the world, making a genuine impact, helping people.
Sometimes I want to be Steve Jobs - come up with an innovative idea, build a company around it and watch it grow and succeed.
Sometimes I want to be part of the Cosbys - a close knit family who have decent careers and lifestyle, where you come home to a husband that will surprise you with dinner, music, and a foot massage, and your kids will surprise you with a talent show with not that great talents but you'll still think it means the world.
Sometimes I want to be an international vegetarian food critic - I'm paid to travel around the world and eat food!

So how do I achieve all these things? If I try to achieve them all, will I actually be good at any of them? Or will the goals conflict with one another and I'll be left doing nothing really well? Does that mean I have to choose? What if I choose the wrong one?

Even within a relationship, I'm not sure I know what I want...
Sometimes I want to have a relationship out of a movie - adventures, excitement, romance, good surprises
Sometimes I want a family man - we'll have a similar set of values, we'll get along with each others families, we'll create a good environment for developing our own family
Sometimes I want someone who will pick up and move around the world with me
Sometimes I just want to be single so I don't have to plan around someone else's schedule, make compromises, and coordinate things

Does a Mr. Perfect really exist? My mom always tells me that you can always want more from someone, but you'll never achieve someone who has everything, so you need to prioritize your needs vs. wants. Truthfully, she's right. Everyone has flaws. Hell I'll admit it, you might think I'm perfect, but yes I have flaws too! So what flaws am I willing to deal with and what flaws am I not?

Hmmm... there seems to be a recurring theme... choice.... maybe we are doomed by our ability to make choices... there was a time where someone would stick to a job for as long as they could work - they never contemplated the options of what they wanted... they had an arranged marriage, where they made it work with whomever they were destined to.. and interestingly enough, many people were very satisfied with that life. So is the problem now that I just am blessed with having too many choices?

I'm on a quest to figuring out what I want. Not an "Eat Pray Love" type quest where I will get to travel to different countries, live a few months, get sponsored by a publisher and figure this out. But a normal everyday quest, I have a job and I have a boyfriend. But I don't have any 'reason' in my life right now, and without reason, I lack the ability to find peace within myself. In order to find peace and be happy, I need to know what i want. In order to figure out what I want, I need to narrow down the choices and make decisions that I can stick with or at least carry out until I can truly decide it is not the choice for me. Everything is an opportunity cost, but until you make a decision, you'll never know, so I'm ready to start making some decisions, just need to do my homework for a little bit longer. Am i stalling? No, i seriously mean homework. I'm starting to assess my life as an outsider - trying to be objective with what is happening, how i handle things etc. Reflecting, I guess they say. A couple months of reflecting and hopefully I can make some more informed decisions!

Wish me luck!