My daughter and I play together a lot, beyond the mass transfer I mentioned earlier, she thought of one... she wants a way to TURN OFF the evolution animation because when you're evolving pidgies or rats or whatever for the XP, it takes a while. The transfer thing is by far the more tedious, though.
I'll be honest, I really only started playing so my 13 year old daughter and I would have something to do together, but it's been a lot of fun. It's neat to have her teach me something new (she's a major Pokemon, and Anime in general, fan). Plus we spend time talking about what to evolve, what to hold on to, etc. When we decide to take a gym, there's a discussion about which one of our guys we're going to use against which of their guys and if we even need to switch guys.
Also, I'm SO glad to see that others get 3 footprints ALL the time. We kept reading that it's supposed to go down to 2 and then 1 and no matter how far we walk, drive, run, whatever, we've NEVER seen less than 3. We're not crazy! ;)