I'm not sure if this is the right place to post this, but for several years now, I've felt the presence of what seem like various beings watching me. The ones that seem to stand out the most are very tall and do not feel human at all. They neither feel evil, just watchful. They will usually be behind me, not directly. I thought I'd mention this on here and see if anyone has had similar experiences with presences and how you sense them, if they were the same beings and perhaps see if anyone knows what they are?