I don't have any firsthand knowledge about what Jennifer Aniston is like in person. Celebrities, including Jennifer Aniston, often have private lives that are not publicly known.
Information about a celebrity's personality, demeanor, or behavior in personal interactions is usually based on media interviews, public appearances, and second-hand accounts from people who have met or worked with them. However, it's important to remember that public personas can differ from how someone is in their private life.
If you are curious about Jennifer Aniston's personality, I would recommend looking for interviews, articles, and accounts from reputable sources to gain insights into her public persona. But always remember to respect the privacy of celebrities and individuals, as everyone deserves personal boundaries and space outside of their public lives.