Small quibble, but is Hockeydude's definition a touch Protestant-centric?
Is it? Are you not considered Catholic if you don't eat your crackers and wine?
I wouldn't consider you a practicing Catholic if you aren't taking communion regularly. The definition of practicing a certain form of Christianity will necessarily be more stringent than practicing Christianity in general.
Communion is an interesting criteria that I would consider a normal part of practicing Christianity, but then the Pentecostals/Evangelicals don't put much emphasis on it, and many don't offer it at all.
That criteria does really hold with the Catholic Church's teachings. Using Mass attendance does, however, actually receiving communion is only required once annually by the Church's rules.
