“Why do you want to continue with Transfiguration, anyway?  I’ve never had the impression you particularly enjoyed it.”

Neville looked miserable and muttered something about “my grandmother wants.”

“Hmph,” snorted Professor McGonagall.  “It’s high time your grandmother learned to be proud of the grandson she’s got, rather than the one she thinks she ought to have — particularly after what happened at the Ministry.”

Neville turned very pink and blinked confusedly; Professor McGonagall had never paid him a compliment before.

“I’m sorry, Longbottom, but I cannot let you into my N.E.W.T. class.  I see that you have an ‘Exceeds Expectations’ in Charms, however — why not try for a N.E.W.T. in Charms?”

“My  grandmother thinks Charms is a soft option,” mumbled Neville.

“Take Charms,” said Professor McGonagall, “and I shall drop Augusta a line reminding her that just because she failed her Charms O.W.L., the subject is not necessarily worthless.”  Smiling slightly at the look of delighted incredulity on Neville’s face, Professor McGonagall tapped a blank schedule with the tip of her wand and handed it, now carrying details of his new classes, to Neville.

Harry Potter and the Half-Blood Prince – J.K. Rowling