Vivy was AOTS for me. It started so strong, and just continued to be really good all the way through. I watched the summary episode last night and that was a great reminder of how great it was.
Very close runners-up: SSSS.Dynazenon and Odd Taxi. Dynazenon had a great vibe and atmosphere, and I thought it got better and better every week. Great cast of characters. I loved the ending and all the mecha goodness. Odd Taxi was quirky and at times a bit slow, but in just the right way. Probably not for everyone, but I thought it was very good. It also had a great ending--it all came together so nicely in the final episodes.
While Super Cub was not quite in AOTS territory for me, I will say that I did look forward to it every week. It was definitely worth watching.