We all wish to spend a lot time in retreat for various reasons.
Such an aspiration is admirable and praiseworthy. What is always very important is that we should practice every day even after completing a three-year retreat. The three years do not make us perfect. There are instances where people who did three-year retreat seem to have more negative emotions than those who have not done long practices. In my opinion, everyday practice of dharma makes us a better practitioner and helps us not to allow arrogance and stupidity take the lead. Therefore one should perfect one's practice to make oneself perfect!