I am a Methodist because years ago I had M.E and, after we moved house, I was unable to get to our Anglican church for the morning service. It started way too early and there were too many people there.
There was a point when I was hardly going to church at all, and my husband encouraged me to find one that was more suitable, "even if it's a different denomination". The small, friendly Methodist church suited me. After only a few months there, someone suggested that I might be called to be a preacher, and the nature of their training course meant that I could do it in my own home, in my own time. The church were very encouraging about this and did not believe that my illness was a barrier to serving God or being used by him - unlike others who were saying that I'd be more effective when I'd been healed.
I kept going to the church because, at a time when I'd had to give up work and was feeling pretty useless, they encouraged me to believe that I had a gift and could still serve God even in my weakness.
I am still a Methodist for reasons of church politics. I once resigned, went back to the Anglican church, told them I was a preacher with 8 years experience and asked if I could join their preaching team. I was told, "no, we don't need any more preachers, and besides, you'd have to do the Anglican preacher's training (3 years) before you'd be allowed to do that."
When we moved to the north of the country 5 years ago, my nearest Methodist church was actually a joint Methodist/United Reformed Church. I, and most of the congregation, chose to be a member of both denominations.