I love my PhD too, three years in, part-time. It's one of my better decisions. Sure, it has its ups and downs but, having done other jobs in my time, this is the first one that has really challenged me. I've moved into a paid research post now, so that at least my current job now complements my PhD, and wouldn't change things for the world. That said, I'm on the homeward trek... all data collected and in the process of being analysed. Other than that, just writing up to do... three chapters to go and have allowed myself until April next year to submit a first full draft.