Where is the complaint?

I'm using a Desire. Well known for being an awesome HTC phone with just one flaw: very little internal space. So, this sort of limitation has made me very aware of the space any app takes. I have a Galaxy Tab 10.1 with infinite space (compared to the Desire, anyway), where I put all the heavy apps. But I still check the app size before downloading, out of habit.

Also, as a developer myself I can't help but wonder what is inside an app and what makes one super lean and others so heavy. The same way I wonder why apps usually ask for a zillion permissions they don't need.