Since I became a Druid, I've felt closer to Quakerism, Paganism, and Catholicism.
I used to be a Quaker, and I always liked their values, but the main thing they did was sit in silence, and I didn't get a lot out of that. Now, as a Druid, I practice daily meditation, so I've found how to get something out of silence.
For some people, Druidry is like a denomination within Paganism. Others are Druids but don't consider themselves Pagan. They may be atheist, monotheist, or pantheist. I do not consider myself Pagan. However, Druidry does have a lot of the same practices as Paganism, so now I feel closer to Paganism.
And though Catholics would probably find this quite alarming and heretical, I am finding, with my background in Quaker simplicity, that the use of candles, incense, rituals, altars, water, robes etc. in Druidry makes me feel closer to Catholics. Druids even have a ritual very similar to the Catholic ritual of crossing yourself.