3. I needed something to save time on my 500mile commute back and forth from work each week. Yes, I'm prepared to drive when the weather is not VFR compatible.
First, I think you made a great decision, and I'm glad you got such a good plane. The 150 has no bad habits, and it's hard to get snakebit buying one with a current annual. The 150 is a plane that you can fly for fun, without having to justify ownership. I equate it to an early Ford Mustang -- 2 seats plus some room in back, simple, lightweight and sporty without being high-maintenance.
Second, I suggest a mind-set adjustment. PLAN to drive, be PREPARED to fly IF conditions are suitable.
Third, now that you have it, RESIST THE URGE TO JOIN THE MOD SQUAD for at least the first 100 hours of flying. There are a bunch of things that you can do to your plane, but you should get comfortable with it before you start making changes. You may not need something that looks like a must-have right now.
Fourth, GO FLY SOMEWHERE. We joke about the $100 hamburger (with a 150, that's about a $50 burger), but seriously, you will soon get bored with flying around the local area without having somewhere to go. Get a paper Sectional and mark the places you want to go, then the dates that you get there. Get a notebook, and write down comments about the places you fly.
As I said above, you've made a great decision, and it will pay off in the years to come.