He's also one of those who whore themselves. Didn't he kiss the Inter badge just a couple of months ago?
He's sentimental and an adventurer at the same time. If he said that he'll always love and remember Barcelona, I believe that he meant it. Just like he did love Chelsea and Inter while he was there.
I have a brother who's just like that. He moved at least 10 times in his life, in many different countries, and every new place was the best place he ever was to and the place where he plans to live for a long time, just to move after a year or two.
As for Barcelona, I'm sure it has place in Jose's heart. If you check his career as a player and as a manager, you'll see that the 4 years in Barca are his longest stay at one club. That's where he learned the most, imo.