This may be more appropriate for the older members, but younger ones may find it useful and may have some advice to give.
My really big one is I wish I was less of a 'people pleaser', less compliant.
I think I have been quite easily manipulated during my life and if I hadn't been, my life would have taken a different course.
I have finally learnt to say 'no' and am trying hard to 'please myself'.
What about you?