Dana, welcome and congrats on your great success!
I, like you, wasn't too motivated to exercise when I started. Reasons for exercise aside (try looking for an excellent article posted in the forum last week...I've forgotten the title, but I'll try to link to it after I post this), it was tough to get going! But once I did, I found that the results (bye-bye weight, hello toned muscles!) and the endorphin boost really kept me going! Some hints:
Try lots of things at first...it'll help you find the ones that really empower you and keep things interesting! Try some classes and some work alone, though working with a buddy does help you stay on track. I do strength training (the Ladies Who Lift forum is a great resource!) and use the elliptical, but I also go to a Jazzercise class (so fun!) and a yoga/pilates class. I also have tons of tapes at home...bellydancing, yoga/pilates, country line dancing, and that keeps it interesting too!
I hope you can find some things that inspire you!