How can you tell if a guy is good or if you need to find out for yourself?

I've been experimenting with Facebook dating, and it's been hit or miss. A guy did reject me when I told him I couldn't meet until after the holiday. Inquire about your interest. This part turned a little weird. I apologise woy wouldn't work out, I said. After that, I blocked him and said, "I'm not interested in you anymore."I came across another man who had taken a photo of me flying. He's also got a sunflower lanyard on. He also inquires as to your search criteria. I said a serious relationship without games or seduction tactics. Honest, respectful, and reliable.
How can you tell if a guy is good or if you need to find out for yourself?
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