I like that there's a good reason for everything that we do on the pitch now (and off, of course, but the "on" is what we see). Pep doesn't have the team playing 'off the shelf' tactics, everything we do is tailor-made. That means we keep possession one match and play long diagonal balls in another; we take quick, short free-kicks sometimes, and swing balls into the box at other times; we play with inverted full-backs, or we play them out wide; we hit free-kicks over the wall, or sometimes under the wall :)
Instead of seeing a successful team and just blindly copying their general play without really knowing why, except that all together it seemed to work, Pep figures it all out for himself and could explain in detail the thinking behind every move. We'll have frustrating games this season that we'll draw and lose, but it won't be through cluelessness or apathy (no previous manager in mind...). When we lose, I feel confident that we'll go down trying everything in our power to win. Those kind of defeats are a lot easier to take.
I also like what Kolarov's been up to lately.