I can only speak for myself. A huge reason I disliked Hillary before was how fake and scripted she came across. Obama was much more genuine and less of a typical politician (at least in the early stages of the primaries). Now as SoS, Hillary has relaxed and allowed her normal side to come out. She's much more likeable and is actually showcasing her skills as a leader and global power player. Not to mention she's showing her sense of humor now, which is great in my opinion.
Indeed. 2008 Hillary was a faux. Now being the SoS does wonders to your image.