So true, there is always way more to explore than we have time for. :)
Sure, that is a great question, here are a few pointers that are based on research findings:
The reason people get more clicks through Buffering is because of two things. Firstly Buffer spreads out your Tweets under Twitter peak times. This is based on some well-respected research by Dan Zarrella (http://blog.kissmetrics.com/science-of-social-timing-1/). Tweeting during these times increases click rates considerably. The second part is that Buffer makes it very easy to Tweet more frequently. If you Tweet more frequently, well spaced out and at peak times you are very likely to increase your click rate by up to 200% compared to the average, randomly posted Tweet. Does that make sense?