"The Professor 's Teddy Bear" by Theodore Sturgeon, now that one is pretty weird, also enjoyed "The Other Celia" by him, a strange story with a tragic ending.
I think there was a pretty weird story called ( I could be completely wrong about this ) "Idol Of The Flies" about a very unpleasant boy who some how attracts flies, I know it was written by a woman but her name completely escapes me.
Will try to think of some more with my old, creaky brain, I sometimes think I have an 8 bit brain in a 64 bit world (lol)!
P.S. There is also one called "Words Of The Guru" maybe by Richard Matheson but I could be wrong about that.
For a humorous one try "The Accountant" by Robert Sheckley, also loved the ending of "The New One" by Frederic Brown.