Just very curious to know what people are using their mcu's for! And which device's you're using as well.
I use them for home automation, catching strobes from the "kWh led flash", driving strings of led in the front and back of the house, using pwm etc.
They are (or actually, will be, it's not completely ready yet) driven using i2c (twi), so I can add easily add various sensors that also work with i2c.
That means attiny's will just do for me.