I would say they are a "Good confidante"
as per MorganFR confidante is gender specific for Women, there is also confidant
When you talk about something hypothetical, you replace is/are by the subjunctive were, and for all other verbs you backshift the tense of the verb in the same way that you do for reported speech.
When you want to ask for something, you can make it more polite by talking about it as a hypothetical suggestion, rather than a simple question.
Will you mind if I say something? - simple question
Would you mind if I said something? - hypothetical suggestion
We can use the present tense say because the context makes it clear that we are talking about something that will happen in the future. See more about using present tense for future actions here.
People rarely use present tense will, but you will often hear people using present tense for the second verb- say rather than said.
In a classroom situation, you are asking the teacher for permission to speak- you can do this using
may or
can. To make a formal request, you use
may - the second meaning in the
Cambridge Dictionary:
May I say something? - simple question
Might I say something? - backshifted- hypothetical suggestion
To make an informal request, you use can - the second meaning in the Cambridge Dictionary
Can I say something? - simple question
Could I say something? - backshifted- hypothetical suggestion
You can add please to any of these options- either before or after the sentence, or before the verb.
Best Answer
The simple answer: Yes they are, in this case, interchangeable
The accurate answer:
If we look upon the sentence from a theoretical viewpoint, the two sentences have slightly different connotations.
"Would" is the past tense of will (aux.v.). It is used as a conditionals and to express that something is unlikely to happen. (It is also used in polite requests, but in that case it is, as I explained here, a conditional).
"Will not" implies that there is as reason which hinders him/her from understanding your taste regardless of anything else. E.g.: "I will not tell you why therefor you wont understand it."
But only a pedant would correct you or be disturbed by your usage of "won't"
It is also worth noting that Google Ngram has around as many hits for "you would not" as for "you will not"