I LOVED Fangirl! I truly think this could have been me, if I had the ability to write, a twin, and went to college. Ok, so about the only things I have in common with Cath are the tendency to obsess over things and be insecure at times, but it's a connection! And probably the biggest reason I enjoyed this book so much. 
 Cath is a HUGE Simon SnowcoughHarryPottercough fan. Her sister Wren used to be as well. And then college happened. Her sister wants almost nothing to do with her, her roommate's boyfriend (view spoiler)[not really, just friends (hide spoiler)]won't leave her alone, and she's not sure what to think about her partner in Fiction Writing. Oh, and she has to finish her Simon Snow slash fic before the last book comes out. 
 Cath's problems and insecurities are real. The what-if's of leaving home and leaving family behind. Who will take care of the day-to-days if you're gone? The anxiety of meeting new people, or joining a large group of people when you don't think you'll fit in. Even her actions/reactions towards her mom are real. I have wondered how much of Fangirl is a reflection of the author's life. 
 The only complaint I have is that there is no Carry On for me to find and read.