It feels good to hear her saying the things I'd like to say myself.
I vicariously enjoy listening to her say whatever is on her mind.
1) It feels good to hear her saying the things I'd like to say myself.
「自分で言いたいことを彼女が言ってくれるのを聞くと気分が良い。」
2) I vicariously enjoy listening to her say whatever is on her mind.
「代わりに彼女がズケズケと言うのを聞くのは楽しい。」
vicariously は 「代理的に」という意味です。
ご参考になれば幸いです!