Just having the "pleasure" button artificialy pushed would feel empty. But having a great time, and sharing it with new people, in new locations, discovering new stuff, in a wrold with enough tech to imagine new experiences, travels, forms of arts, or type of sentient entities we can't even think of today could probably keep me entertained at least a few centuries.

But if we ever get to witness the singularity, our best bet is to stay mentally flexible, and ready to reassess any of our belief. Because that would be one hell of a ride to destination unknown.