In 2005 I got cut from my "dream corps" and marched with my "second choice corps", hoping to gain experience.
In 2006 I got cut from my "dream corps" and decided that marching anywhere else would not help me get into my "dream corps". I stayed home and practiced concert horn all summer instead.
In 2007 I made it into my "dream corps".
If I had it to do all over again, knowing what I know now, I would have taken 2005 off and practiced at home the whole summer. I don't regret marching in 2005, but I don't feel that it was a worthwhile step towards getting into my "dream corps". It was fun for what it was, but I got more out of my concert horn in preparation for my "dream corps" than I got out of marching a summer with another corps in preparation for my "dream corps."
I think that if someone wants to march drum corps and happens to have a favorite corps, then they should march where ever they can. However, if someone wants to march in corps "X", they should go for it and if they get cut then evaluate for themselves "is drum corps what I want, or do I just want corps X?"