I'm going to post a links to some the previous questions that mirror this one. I'm not saying that we shouldn't have this discussion again, just noting some old conversations we had for new users to explore:
0. What's the difference between this and reddit?
1. How do you decide who to follow?
2. Hubski Shortcomings: What are they?
3. Dealing with spammy users
4. Hubski is Maturing
5. Hubski Apathy