Just flew in C on A380 (ICN-FRA). I had seat 20K (last row main cabin). Would not take it again, but not sure which other seat I would prefer. Definitely also not row 10: Quite a bit of smell and noise from the galley and the restrooms. Also quite a bit of extra light from the galley (was not too much of an issue as it was a dayflight). I probably would take a seat more in the middle-front, e.g. row 14 or so.
In general, with a ~90% full cabin (as on my flight), the service is not personal at all. Although I had the feeling that the FAs were quite fast and coordinated, it still took 2.5h to complete the main service, but there was even not a single time an extra round/refill of drinks being offered. In contrast to my last LH C flight ~ one year ago, the food was in fact quite good. Still, whenever I can I try to fly LX or OS, because in my opinion even the worst service I ever had on LX/OS in C was still better than the best service in C on LH. Furthermore, the 'new' LH C seat is simply ridiculous: uncomfortable, narrow, short and zero privacy. At least the A380 A/C and H/K seats do not have the V-configuration in which you come in closer contact to your seat neighbour than you would want.

P.s.: Also had my first experience on TG and OZ in C (ICN-HKG and vice versa, respectively): Was VERY positively surprised and look forward to my longhaul FRA-BKK on TG in Nov. Given the much lower prizes on certain routes in C, plus possibilities to upgrade/upfare for little money to F, LH becomes even less attractive.