First, I think this thread is a great idea. Second, I think there's too many things about too many religions that I like to list them all here, but I'll give it a shot:
Christianity:
-I love the simplicity and mysticism of Quakerism
-I've always loved the mystical elements and beauty of the Eastern Orthodox liturgy
-the overall dedication of most Christians to their faith
-the family oriented Mormon faith
Islam
-The adhan
-their dedication, like Christians, is strong
Hinduism
-there's so much here that's similar to Buddhism, it's impossible to list them all, or pick just a few things
Taoism
-just like with Hinduism, the similarities with Buddhism, and particularly Zen, are intriguing
Paganism
-their devotion to nature
-their general openness
These are just a few things, but are by no means all things, that I like about other religions.