Digital without a doubt.
- More convenient to travel with it
- Awesome how the e-ink looks just like paper and draws little energy
- Your entire library can take much less space
- Save the trees
- If it gets damaged, only your device will be destroyed, but your library (hopefully) remains (if you make backups)
- Instant access to basically any book (no need to wait for delivery or in-person shopping)
To me, my Kobo was one of the best investments I've ever made. Before buying it, I didn't really read many books