The default invite link for a bot (https://discordapp.com/oauth2/authorize?&client_id=1234&scope=bot&permissions=0)
displays a blatant looking embed with just the discord image. There is no concept of bot's personality in the embed. Since bot's invite link is one of the first interaction with a bot, there should be a provision to let the bot show its appeal.
Making the invite embed customizable (using query tags perhaps?), would be a really good enhancement for bot developers.