McGonagall seems very no-nonsense, but underneath she's not like she seems. Especially during Umbridge era. "It unscrews the other way!"

Yay for McGonagall! And your mom is pretty cool too! :D
Yes, where the Marauders go, there is angst...
Finally, your OC has me chuckling too, because my brother's own first-HP-self-insert-fanfic put himself in Ravenclaw in the twins' year - and his name is Matthew!

This was bloody brilliant! I loved it mate!

Now we know where you got your imagination - and your sense of humor! :-)