Rambam a talmid chachom should be a nice person

hilchos  de'os 5:7 from Sefaria

תַּלְמִיד חָכָם לֹא יְהֵא צוֹעֵק וְצוֹוֵחַ בִּשְׁעַת דִּבּוּרוֹ כִּבְהֵמוֹת וְחַיּוֹת. וְלֹא יַגְבִּיהַּ קוֹלוֹ בְּיוֹתֵר אֶלָּא בְּנַחַת lעִם כָּל הַבְּרִיּוֹת. וּכְשֶׁיְּדַבֵּר בְּנַחַת יִזָּהֵר שֶׁלֹּא יִתְרַחֵק עַד שֶׁיֵּרָאֶה כְּדִבְרֵי גַּסֵּי הָרוּחַ. וּמַקְדִּים שָׁלוֹם לְכָל הָאָדָם כְּדֵי שֶׁתְּהֵא רוּחָן נוֹחָה הֵימֶנּוּ. וְדָן אֶת כָּל הָאָדָם לְכַף זְכוּת. מְסַפֵּר בְּשֶׁבַח חֲבֵרוֹ וְלֹא בִּגְנוּתוֹ כְּלָל. אוֹהֵב שָׁלוֹם וְרוֹדֵף שָׁלוֹם. אִם רוֹאֶה שֶׁדְּבָרָיו מוֹעִילִים וְנִשְׁמָעִים אוֹמֵר וְאִם לָאו שׁוֹתֵק. כֵּיצַד. לֹא יְרַצֶּה חֲבֵרוֹ בִּשְׁעַת כַּעֲסוֹ. וְלֹא יִשְׁאַל לוֹ עַל נִדְרוֹ בְּשָׁעָה שֶׁנָּדַר עַד שֶׁתִּתְקָרֵר דַּעְתּוֹ וְיָנוּחַ. וְלֹא יְנַחֲמֶנּוּ בְּשָׁעָה שֶׁמֵּתוֹ מֻטָּל לְפָנָיו מִפְּנֵי שֶׁהוּא בָּהוּל עַד שֶׁיִּקְבְּרֵהוּ. וְכֵן כָּל כַּיּוֹצֵא בְּאֵלּוּ. וְלֹא יִרְאֶה לַחֲבֵרוֹ בִּשְׁעַת קַלְקָלָתוֹ אֶלָּא יַעֲלִים עֵינָיו מִמֶּנּוּ. וְלֹא יְשַׁנֶּה בְּדִבּוּרוֹ. וְלֹא יוֹסִיף וְלֹא יִגְרַע אֶלָּא בְּדִבְרֵי שָׁלוֹםוְכַיּוֹצֵא בָּהֶן. כְּלָלוֹ שֶׁל דָּבָר אֵינוֹ מְדַבֵּר אֶלָּא בְּדִבְרֵי חָכְמָה אוֹ בִּגְמִילוּת חֲסָדִים וְכַיּוֹצֵא בָּהֶן. וְלֹא יְסַפֵּר עִם אִשָּׁה בַּשּׁוּק וַאֲפִלּוּ הִיא אִשְׁתּוֹ אוֹ אֲחוֹתוֹ אוֹ בִּתּוֹ: 

A disciple of the wise should not be noisy and loud like cattle and animals when talking, nor even raise his voice overmuch, but converse calmly with all people; nevertheless, in speaking calmly he should not overdo it lest he resemble the overpoliteness of the arrogant. He should be first to greet every person, so that their spirit be pleased with him He should judge every person favorably, telling the praiseworthy things about his friend and not at all about the blameworthy things; love peace and pursue it. If he can see his words acceptable he may speak, if not he should be silent. For instance? He should not appease his friend when the latter is moody; nor question him concerning his vow at the time the vow was made, but wait until his friend's mind will be composed and collected; he should not offer condolence while the remains of the deceased are in the presence of his friend, because he is upset until after the remains are buried, and so in other matters of a like delicate nature. He should not call upon his friend while the latter is down through a failing, but keep his eye off of him. He should not change his word, nor add to or diminish from it, unless it be for the sake of peace and similar worthy objects. As a general rule, he should not speak much else save words of wisdom, or charity and the like. He should not carry on a conversation with a woman on the street, even though she be his wife, or his sister, or his daughter.