From my experiences with different Begonias, the only thing that kills them is rotting roots, or cold. If you can avoid those 2 things, they should stay alive, pests or simply never watering at all, notwithstanding. The exception is tuberous Begonias which can't take high heat, so just can't survive here at all. They're a dangerous addiction, so many of them.
If you like pinching plants in general, you might have the personality type for bonsai. Fast-growing plants like Begonias (and Coleus) are fun to learn on.
