I used Family Tree DNA because my MIL, who is very into genealogy, asked me to do it and paid for the test.
So far it's told me exactly two things.
1. I have Irish ancestry. (Not a peep about my English, Scottish, Indian, or Polish ancestry. My father's whole family is Polish.
)
2. The closest relatives it's shown me are possible fourth cousins. (Which means I am not closely related to my husband.)
I tried to get my dad to do the Y-DNA test, but he refused, and I don't have a blood-relative uncle or other male relative I can ask.
Guess I'm just a mystery wrapped in an enigma.