I try to recieve every Sunday.
I am not worthy, every Sunday. I'm never worthy of recieving Christ.
When I receive Holy Communion, I can feel a change in myself. It's very hard to explain, but I feel Him in my heart.
When I don't receive communion, I feel absolutely offal. I feel more tired, I get sick, and I start to get an attitude where I really don't care about anything. I don't know how people can go without Him for more than a few weeks, I would literally die.
EDIT: I once stayed at a monastery where there was liturgy everyday, as well as confession. I only spent three days there, but to be able to confess and receive Christ every day was absolutely wonderful.