Soon after I took on the second plot, I realised I had a new neighbour (the end plot suddenly got strimmed and lots of pallets appeared) It was several weeks before I finally bumped into the new tenant. I had spent the day at the first plot so was tired and dirty, but I made an effort to go and introduce myself. I barely got 2 words from this person - stuck up cow I thought as I headed back to my car to go home.
About a month later the whole family turned up to do some digging, my heart sank - and yet you could never meet a nicer family with a great sense of humour.
I can only think that shyness was the reason (unless I looked scary!) So I agree, don't judge on first impressions.