[ ] Quickly take the intersection of two datasets (eg everything from layer A that is inside shape B -- like all the shapes in Detroit)
[ ] Quickly remove columns from a dataset (takes like 20 clicks and a lot of waiting in QGIS, or unnecessary import/export + arcane ogr2ogr commands in Postges)
[ ] Easy way to go back to a previous version of my data (or at least save a copy of the original)
[ ] Easily measure area (QGIS: select layer, open attribute table, open calculator, new virtual column, $area formula)