Since it's the first day back, I'm throwing a softball.
What's your favorite mitzvah?
When all's said and done, I would say avoiding embarrassing other people. I try to put a lot of effort into that.
What do I look forward to improving? Kashrut. Only because I want to be an awesome host one day. So really, I want to improve my observance of hospitality, and kashrut is a means to an end :)
I guess I'm not surprised that interpersonal mitzvot come to my mind first. One day, I'll be an expert in mussar (not the fire and brimstone kind).
So what does this teach me? That I actually need to be more committed to the mitzvot between man and Gd. They don't come easily to me, and certainly not now. Gd and I are currently having issues. And while people have encouraged me to yell at Hashem as much as I need to, I apparently default to my four-year-old self and the silent treatment.