My biggest regret is consistently loosing saves on every installation of Blockland over the years.
I have lost a whole set of saves three times in a row every time I played BL throughout 2010 to 2015.
I mean, sometimes it wasn't my fault.. Like, when my father destroyed my laptop when I was 12 because, he 'didn't want me to play blockland anymore'.
So, he tossed my laptop across the room and RIP pc and RIP all of my saves back in 2012.