I felt that way on my first cycle of sten quite a few years ago. I eventually did get burned out on the injections and my better judgement told me that I had to stick with the cycle. Now I just plan my cycles around vacations, seasons, etc. I look forward to each one because I see them as a treat or a reward for training natural for several months sticking with the game plan(diet, consistency, tanning, shaving and whatever else the lifestyle entails).
It is a good feeling when you clean out for 9-10 months, diet down and you can look at yourself in the mirror and say damn I look pretty damn good, better than anybody in the gym (my gym LOL). But then the little voice starts talking, "just wait until it's time again".