To me software engineering is an interesting and kind of inexhaustible field, but the longer I do it, the more familiarity I have with the problem space, and some parts of it can become routine (it's ok to do things the boring way). And so I don't experience it as a constant adrenaline filled racecourse — often it's just an interesting professional activity. And if I decide to get deeply emotionally drawn in some of the time, that's my choice, rather than a requirement of doing my job.

(Obviously, the job evolves a lot over time and will keep doing that, but it isn't always starting absolutely from scratch every time either.)