[jsaxton86]

Most of the comments in this thread are ridiculous.

Just as you (hopefully) get to choose how many hours you work, your coworkers also get to choose how many hours they work.

I'd ask yourself two questions:

1: Are you happy with your current work/life balance?

2: Can you achieve your career goals at your current workplace while maintaining your desired work/life balance?

If the answer to either of those questions is "no", you should have a conversation with your manager.

[aji]

Seconding this suggestion. These are the sorts of things managers are expected to deal with, and it's important to engage them when you're unhappy with your team's situation. Knowing what's expected of you will make it easier to decide if changing jobs is the right choice for your career. If you don't feel comfortable talking to your manager about this, that's also a data point worth bringing into the decision.

[deegles]

I think the issue that OP is getting at is that his coworker's work habits are impacting the second point.