I agree with everyone, Sheldon iniatiating a kiss would be awesome.
I also would mind maybe seeing a little bit more jealousy to give Sheldon the kick up the butt he needs when it comes his input in the relationship. Like, when Amy went on a date with Stuart and how adorable it was that Sheldon chased after her and asked her to be his girlfriend.
Another Valentines episode would be nice - maybe Sheldon planning something special for Amy or them spending a night away together, something along those lines.
I'm actually so excited to see what happens with, "Shamy".