For me, it can be fun when I am solving a more abstract problem that fascinates me, when I am not constrained by time and by other people’s opinions, and when s

For me, it can be fun when I am solving a more abstract problem that fascinates me, when I am not constrained by time and by other people’s opinions, and when starting on a clean slate without any accrued technical debt. On the other hand, oiling the cogs of a big legacy CRUD app can be a highly soul-sucking experience. You would do some small changes required by the business process, while stepping on egg-shells in order to keep the fragile thing still working.