Personal experience of mine is; people who spend a lot of non-work time on side projects and open source bring a specific energy to their work. What they are usually not good at is turning up for work, getting their head down and diligently burning through some work. Instead they tend to be ideas people and leaders.
All organisations need a balance of personality and experience to be effective.
So get excited about Bob because he is an Open Source advocate and regular conference speaker. But also get excited about Alice because her experience is right and when she interviews she is dedicated and detail-oriented.