For all its flaws, I like Insurrection. Don't know why, really. Never thought too much about it. Maybe it's the 300 year old hottie.
If I have to choose (and I don't because all the movies are right here where I can run them anytime at the touch of a button), I'll watch TWOK, Voyage Home, TUC, INS, and ST09.
But I usually run them all in order.