But...what was your body composition like at 230lbs? How tall are you? If you're short and quite fat at 230, then such a diet will drop a lot quick, then level out and not do much from there. It's the zone between "overweight" and "fit" that is hard to cross. That's where you need to moderate what you eat along with activity since either one on its own will only get you so far.
I'm about 6' and can bounce between 210 and 195 or so pretty easily on diet alone and just mountain biking on the weekends, maybe jog a few miles a day or two during the week. I didn't below 190 until I started excersizing during the week regularly along with moderating my diet. On the diet side, I did nothing extreme, just got used to eating smaller portions, only eat out once or twice a week, and for the rest of the time cook stuff I make at home. On the excersize front, I try to either run 2.5 miles or so each day or swim 500 yards (not so great with the swimming yet) in addition to mountain biking on the weekends. Weight-wise, I'm pretty steady in the low 180s with high 170s sometimes, but I would still classify myself as "out of shape" and certainly not really fit. I'll save that for when I can run a 5k before breakfast without feeling tired, or swim those 500 yards without feeling like I'm going to drown at the end.