Thoughts are umimportant Thursday

I've decided Thursday is the day we play Would you rather. I have loved that game since I was 8, and I still love it today no matter what. I feel even though we are older, we should keep playing in a more "mature" way (if this is considered more mature to all of y'all). Here is the first question for Would you Rather:

Would you rather as a 25-year-old, forget your entire childhood up to age 15 OR lose your memory of the last 5 years?

Good luck with this one :)