Confession: I am a font HOARDER.
I wouldn't be surprised if my computer told me that my memory is almost full due to the amount of fonts I have downloaded. And I only use maybe 10% of them. But I am just obsessed with pretty fonts.
I think that a beautiful font is a great investment for any brand. Think about some of your favorite brands - you'd recognize their fonts anywhere. Using one or two unique fonts on all of your platforms will tie your whole brand together and help your brand become recognizable.