Changing parishes is different from changing denominations, in many ways. To jump around churches with different beliefs implies that it's not the truth of the faith that's important, but rather how a person feels about the other church members.
C.S. Lewis recommended that Christians attend their local church (local Anglican parish, in his case) in order to avoid the temptation of searching for a church where everything and everyone was perfect. In his day, an Anglican probably wasn't going to find Gaia-worship or "gay" sacraments, of course :-).
Still, I think he made a good point, that we can fall into pride and begin to think that we're so special that we *deserve* a church with a perfect pastor, a liturgy that exactly suits us, and only the *right* kind of membership.
The challenge regarding changing parishes is walking a fine line between what is morally/spiritually dangerous to what is subjectively wanted/desired. My new parish has a few things missing, but they in no can be classified as spiritually dangerous (as was the case before), so I think I walked the fine line to a reasonable solution.