I have more than 1000 people from playing online (through spotpass) and ZERO from streetpass! Thank god I tried homepass once some time back and got about 80 of them, otherwise the plaza would've been completely useless! It's annoying how Nintendo kind of forces people to get many systems in order to play online nowadays and it may just be the reason the company's products don't do so well lately! Anyway, the only useful thing about the Mii Plaza is that you can take Miis you met in other games and then take them to the Mii Maker. Other than that, it's just a waste of time! If now, you could take the decorations and have the permanently on your Mii (when others see your friend card), then that would be good!