Finding your purpose in life

Forgive me if the following stuff has already been said - I just felt like responding to a topic I hadn't seen before.Although it sounds profound, I don't think the idea of having a life purpose is particularly interesting. I tend to believe that aspirations of all kinds are merely recieved opinions derived from family or trusted associates.If pushed, I'd probably be tempted to say that my purpose in life, such as it is, is to make myself feel good. Clearly I don't mean by this that I perpetually masterbate, or steal sweets from toddlers whenever I feel like it. Although such actions might grant some form of pleasure, as a social animal, my behaviour is in large part circumscribed by complex societal rules. In effect this means that if I do indulge in such behaviour, I will be left feeling worse off than if I had not acted on these impulses.From experience though, I'd say that I'm motivated towards comfort and security like most creatures.So ultimately I believe that my purpose isn't my purpose at all; it is just a bunch of ideas that I've picked up from my fellow humans like a common cold.As you may have guessed, I'm a pretty determinist sort of a person.
Although I don't see any reason to believe in free-will, I'm perfectly happy to believe in the ILLUSION of free-will. Doing so enables me to function in this society.So how do I sleep at night? Well, mainly because I'm interested in seeing what happens next. I only think determinism is stultifying if you can see the choices that you are going to make before you make them.