Im not the nicest person dp has ever met, dp isnt the nicest person ive ever met.
My dp is usually universally aknowledged as lovely, however as their partner i get to hear the unkind secret things they dont tell others (as all humans have) which means i see a slightly different side than everyone else. I still think dp is lovely, but i guess im more likely to think someone else is the "nicest" as i would only see the public side
Nicest means lots of things as people have said. It might mean polite, thoughtful, kind, pushover etc. I once dated someone who was really really polite, and the "nicest person" however had no boundaries, could never say what they thought and was a complete nightmare to be with.
The kindest person i know on reflection is a lady who swears like a trooper, is very impolite and is brash at times however would remember that today is the day her admins mother died ten years ago and give her flowers.
My dp isnt the nicest, or the funniest however is a nice mix of all sorts of personality traits. Kind yet firey, confident yet sensitive. There isnt a one word for Dp as they are a well rounded, "good person" and for that i love them dearly.