IanG's points offer a lot!
2) Agreed! I was shocked when I finally tried the right shoes for me
4) Yup. You talked about C25K not being personalised enough, but it's really just a guide. Schedule your time and do your best that day
5) Running - lots of cardio I guess - affects my hunger levels, which means I have to keep an eye on my diet and sugar cravings. My runs have better performance in the evening. I lack energy in the morning for a performance run, so I need to time my eating before hand (to avoid cramps) and to eat the right kind of food to have the right energy level. Pay attention to your body, try different approaches and you see what you enjoy.
6) Music

Pumps you up, keeps you going!
7) The best advice
I recommend making sure you run on soft surfaces - a gym with a rubbery track, or on grass. This lessens the impact on your knees. I avoid concrete.
A good speed walk has a lot of the same benefits too!