1. Do I believe Alien UFOs are real? I believe that it is possible that intelligent life has evolved on planets orbiting far-distant suns. After all, we have indisputable evidence that intelligent life has evolved once already (no satire, please), so it's clearly possible, we just have no data on how likely or frequent life is. Not sure I buy the Drake Equation.
2. Are aliens visiting Earth? Well, I'm not going to rule out interstellar travel, although I understand that the most likely method of travelling unimaginably large distances is not warping space or opening wormholes, but accelerating as close to the speed of light as you can and enjoying the ride, no matter how long it may take to travel between solar system (and it could take a very long time). So, it's not absolutely impossible that Aliens might build high interstellar arks, place themselves in suspended animation and drift thousands of years through the dreaming void until they reach Earth, anally probe a few rednecks and deliver a message of world peace and new age awakening channelled through spiritualist mediums.
Who knows why they'd do that? Their motives are needn't make sense to us. They are, after all, ALIEN.
3. Am I convinced by current 'evidence'. Nope. Not at all. I read a few books in the 90s by a researcher named Timothy Good. Thorough as his body of evidence is, it just isn't all that convincing.
Mr Good rather is rather credulously convinced by Alfred Burtoo, for instance.
Have a look at this startlingly detailed line drawing of the craft Burtoo allegedly saw:
http://www.ufoevidence.org/cases/case707.htm
There's a whole industry around UFOs, and it's guff. Just because Aliens COULD be real, doesn't mean they ARE real.