I don't know if you still want answers but here we go:
1. In your opinion, do UFOs and/or aliens exist? (in any context) - please feel free to elaborate on what you think is out there (or what isn't)
given the sheer size of the universe and the sheer diversity of planets I would say it is likely that life under any kind of form (called lyfe by researchers)
Regarding extraterrestrial civilisation, I think they likely exist/have existed/will exist. but in far lower numbers than simpler forms of lyfe.
2. Would you feel comfortable in openly admitting to the people in your life (outside of SF) that you believe/don't believe? (why?)
Yes, absolutely. Why? Because my opinion is based on critical thinking and rational use of information. If someone formulates convincing arguments in either direction, I would gladly adjust my opinion
3. Have you ever seen a UFO/alien/extra terrestrial? (and do you know anyone else that has?)
No, I haven't. I do not know of anyone who has. (but I know people who believe they have)
4. If you were doing a photographic project based on the history of UFO activity in your country, what kind of images would you want to see (keeping in mind that getting to take one of a sighting will be near impossible)?
I think this would take the form of recreating what people claim they saw. For instance in france there is a case of two children seeing a flying machine. Later it was made clear that it was a military helicopter but this is still something crazy UFO-person claim is a decent proof. I suppose the project would expose what the imagination wants us to see compared to what reality is about.
Weird sightings are very common, and it's quite astounding how people report the moon as being a ufo...