Boyzone
I know a few people who've been on the Alpha course or associated with churches that promote it. Some left because ultimately it made them suffer from a permanent sense of guilt as it focussed on sin, and how sinful humans are and how undeserving man is of god's kindness. They also felt it to be rather self righteous with a splash of bigotry about homosexuality.
But it also seems to suit a lot of people as the happy clappy version of Calvinism. It's down to you to decide if it's for you.