I wouldn't say he's bland by any means, but this character is definitely talkative, and he's supposed to be. He's not the main character but does show up quite a bit. He tends to lecture and ramble on about things that don't really matter to the main character. What are the dangers of having a character like this? Is there anything I need to look out for or avoid doing when writing him?
Also: how much dialogue is too much dialogue for a talkative character?
EDIT: The character is a walking encyclopedia, particularly in the history department. He's also very strict with the rules, so he often sounds like a parent reprimanding his child whenever the main character breaks a rule. The story takes place in a fantasy universe, so he tends to ramble on about (1) the history of their people and cultural values or (2) how the main character needs to adhere to the rules of their society and think about the community.
He's pretty helpful in the beginning of the story where he does drop quite a few helpful pieces of information about the fantasy world that the characters live in. It's not an info dump; I scatter pieces here and there.
I guess you could see him as comic relief too. He's super oblivious to everything and could talk for an hour about rutabagas if he got into it ;)