When using type for a design you must always limit the amount of typefaces you use –

So you’re working on a design and you find yourself loving more than one typeface. You can’t decide which font  to use so you tell yourself “Maybe I can use 3-4”. This is when you should take a step back, relax and revise your design.

By no means should you use more than 3 typefaces in a design. Ideally you should stick with using 1-2 typefaces.