Well, my own perspective is more or less summed up as "Reality is that which does not go away when you stop believing in it."
The universe around me generally seems to behave in an ordered fashion; I can devise sets of rules and use them to predict the operation of things around me. Furthermore, there appear to be other people around me who act as if they are self-aware, and they can make the same observations and get results that are both self-consistent and match the results I get.
In short, all the evidence I have points to the existence of an objective reality we can all perceive. Can I prove its existence as I would prove a mathematical theorem? No, of course not, since everything I perceive is mediated by my senses, and I have no way to directly test their accuracy. But Occam's Razor tells me that the simplest explanation is that reality exists, that it behaves in a consistent and largely predictable manner, and that everyone gets the same reality.