I regreted giving every lego I had when i was a kid to my cousin because I thought I outgrown Lego at that time (i was 15 i think) ( 4 castles, hundreds of castle minifigs, bunch of lego star wars sets, harry potter sets, bionicles, ...)
Now he's outgrown it and decided to throw it away (WTF?)
Now I have to rebuild my lego from scratch