Love telling stories in some form or another. Been a comic book artist since kindergarden and wanted to do films for others to see on the big screen. Never thought I could be a writer but turns out it wasn't as hard as I made it out to be. If you have a great idea for a plot or a really cool main character you can flesha story around, writing a script or doing a comic can be some of the most enjoyable and rewarding experiences you can ever do.
My advice is to never take criticism personally. Think about why they gave you their two cents and learn from it. The objective is to make the best story you possibly can, even if it means collaboration with others.