- scars: like other mentioned it very much depends on individual healing. Every surgeon will do their best to hide scars, and position them as ideally as they can... but after that it will depend on how your body heals.
- what might be the best technique for someone, might be the worst technique for someone else. We all have different available material, we have different expectations and preferences, and we like different aesthetics. Some like innie vagina, some like more prominent labia minora, etc.. There is no best for everyone. Some might greatly value less invasive technique, with faster and less demanding recovery (peno-scrotal flap for example), some other want the depth and other benefits of non-penile inversion technique, which comes with faaaar longer and harder recovery, and much longer dilation regimen, etc. You need electrolyis hair removal for some techniques, and you don't need it for other. How exactly each technique work and whats the pros and cons of each? You will find many information on this forum and ->-bleeped-<-, and many other websites, where many people have already compared and described pros and cons of different techniques.
-self lubrication: three techniques result in self-lubricating vaginal wall. First is old-school sigmoid colon vaginoplasty. Second is vaginoplasty with urethral flap, it's mostly used in some European countries, including most known Belgrade, where dr. Djordjevic performs it. It's peno-urethral flap. Urethral flap is mucosal tissue, which will create natural moisture, and can be enough self-lubricating to not needing any additional lubrication. Urethral flap is also used in "combination method" that dr. Schaff uses (Lara1969 described more details). Third technique is non-penile inversion with meshed scrotal graft that dr. Suporn uses, where meshed scrotal graft over time can turn into mucosal tissue. About 80% of Suporn's patients report sufficient self-lubrication and don't need to use any additional lubrication. Some report that also their vaginal wall after penile-inversion turned into mucosal tissue. My guess is that happens because lower half of vaginal wall was made from scrotal graft, and their surgeon actually made meshed scrotal graft (which would be the same as dr. Suporn does, but its only half of vaginal wall). The other half where penile skin was used for vaginal lining, has technically zero chance of ever turning into mucosal tissue (I discussed this with SRS surgeon-urologist, and two plastic surgeons who regularly use meshed skin grafts for transplantation after skin burns).