Should I watch Gossip Girl or Pretty Little Liars?

I started watching both of them when they first aired when I was in middle school/ high school and never finished them. I always planned to start both of them over eventually and never got around to it. Over the years, I had found out who gossip girl and A were, so those parts are already spoiled. I need a show to start and wondering if I should even watch either of them at this point? I'm almost 29 now, if that makes any difference.

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