Buddhism, well, oddly enough, I was going to point out that philosophical views do not count as religion to me, but I dismissed it.
In earnest I view the Buddhist belief to be in a sense, harmless. They are not so much religious as they are philosophical, and Buddha is not a god, but rather the dead leader of the philosophical code. At least, to my beliefs. Like, per say, evolution. Darwin is not a god in the evolutionist's mind, just a leader, someone to follow. A guide I suppose would be the best available term for explaining him. Of course, I take that view to Buddhism as well. I myself practice some Buddhist believes, including meditation, but I do not identify as a Buddhist because it seems odd to identify yourself with a philosophical belief system.
Tao Te Ching, hm, never heard of it, though, with some quick research, I can tell you what I see it as. Oh, never-mind. Taoism.
Taoism, to me is an amazing philosophical guide, I too hope to become immortal, though, whilst still living so I do enjoy their code of beliefs just a tad bit more than I would most other philosophical beliefs. I enjoy the system of order -Yin & Yang- and I adore the way of Wu Wei. Which is to always act non-strained even if you are struggling. Harmony is something I personally hope to find in the near future, despite several problems in my life, including cancer, so, Taoism is quite the belief system to follow for me I suppose. Now, there are damaging aspects of it being a religion, since they are generally atheistic in belief. No deity. Both those beliefs are harmless in my eyes.