Just to add another process to add to the many. I don't think mine is the best or the easiest process (actually I think it's probably far more time consuming than some - but I view brewing a bit like making the odd meal - it's an opportunity to do something manual and creative, unlike auditing (my job), and taking a bit of time is something I enjoy. Only difference is that I don't drink making beer (ironic innit?), unlike cooking where the food is less toasted than me!)
On topic.
My system is 2 x stovetop method. That gives me a good batch size, head room for the boil, stepped mashing/mash out opportunities (if required) and no high-grav shenanigans required.
I pick up the bags (there are 2), and place each one into a 7L pasta pot, let it drain until it doesn't trickle, pour the extras into the "kettle" (the pot from whence it came). I then sparge the bag in the pasta pot to the required volume, runnings go into the "kettle". Repeat process for the 2nd bag.
The downside is that it does take longer, as I'm repeating the process across two pots. If I did it in one larger sized pot, I'd cut the time down, but see caveat above re: time.
I did have an esky mash tun. I take complete responsibility for my dodgy DIY skills. It didn't work out, but that was my fault. Cleaning it out was a major pain in the rear, but if I had built it better to continue with it, I'd have just got a larger bag/voile piece, to solve that.
My biggest reasons for my system. 1. I know it inside out back to front, and I produce consistent quality beers, regardless of style. 2. It requires no extra equipment and the cost of my brewery has not increased in the last year. 3. Space and "deconstruction" efficient. I can be in and out of the kitchen and the kit goes into the utility cupboard. It's apartment friendly as well (for when we move into a townhouse/apartment from the two-story monstrosity we have).
Yes, I go to Ross' place and love the bling, but I'm not paying for it for a few extra % efficiency and slightly easier brew day. In the cost-benefit analysis, it doesn't stack up, in my case. I respect other people's systems, and their probable better AG brewing experience. What I have works for me, my space, my abilities.
And I agree with M^B and TB - great to share and great to read others' system. This is what a forum like this exists for.
Goomba