Good question. A sense of accomplishment is a small pleasure, but it scales better than activities that provide high highs but inevitable low lows. Most people have an emotional equilibrium state; stresses and rewards can temporarily move the needle, but it tends to return to center regardless of the circumstance. Given that a lifetime of low-effort activity tends to limit opportunities for broadening your horizons and doesn't have a lasting contribution to happiness, a simple cost-benefit analysis indicates that dedication to personal growth is the best value for time spent. Ultimately, life only has the meaning you assign to it, so if you're optimizing for pleasure, learning and creative pursuits hold the most potential.

I have a large set of sites blocked at the router via dnsmasq, which scales well.

(It also means my unrooted mobile device ... doesn't have such protections when it's outside the Mothership.)