If you're good and work for a reasonably large organization, you'll be thrown into a bunch of projects. It's reasonable to be passionate for some and completely dispassionate for others.

Any project that spans over multiple stages (requirements gathering, design and architecture, coding, testing, release, bug fixing, maintenance, support) has some exciting stages (mainly design and coding) and some less exciting, especially when you're brought in to fix somebody else's bugs or work on somebody else's mess. It's also reasonable to not be super-passionate about such "opportunities".