I went on a bulk, reaching 214 lbs before going on a cut and actually lost 20 lbs in 2 months on a ketogenic diet. Now I'm on a low-carb, high protein/high fat bulk and training with progressive overload principles. I'm at about 195 lbs right now and hoping to hit 215 lbs at a lower body fat %.
Nice. And how tall are you, if I may ask? Because 215 lbs sounds very brick-ish even for my height (6'3).
I did do 24 sessions with a personal trainer in the beginning. I don't think it's worth the money, but he did introduce me to new techniques and corrected some lifting forms and positions that I wasn't doing properly. And made sure I was able to stick to a consistent routine.
And that's exactly why I would need one for. I see this as an ideal opportunity to rebuild my routine and technique. Before, I didn't do some important exercises (deadlifts, free squats,...) due to various reasons, real and imagined, and a trainer could help me get past that to make my training as effective as possible. And - which is even more important for me right now - he'd help me to fall back into a routine.
Edit: From the recent picture you posted, you have a very good base to start from as your body fat % is already low.
Yeah, BF% was never one of my problems, although my metabolism slowed down quite a bit in recent years, but that's actually a good thing. While I gain fat a bit easier now, I also started to gain muscle in areas that were very problematic for me before, for instance legs. I weight almost as much as I did when I lifted weights (a bit over 170lbs), although I didn't gain a lot of fat and lost a lot of muscle in my upper body.
I divided my goals into three steps:
1. step is to start and finish the P90X programme (starting tomorrow), while keeping up with running (three times per week, 45 minutes per run. Gains are made through raising speed and distance).
2. step is to start training with a trainer (presumably at the start of December) and to get to the desired strength, weight and BF% (let's say 185-190lbs at 7-8% of BF) in around 6 months. I plan to continue with my cardio training, but indoor and as part of the same training as weighlifting in the coldest months (December, January).
3. After that, I want to start with some serious running (my ultimate goal is to participate at the Marathon of Ljubljana next October) and also implement an additional activity. I'm thinking about either karate or sport climbing.