Every time a title or character is relaunched, it's another throw of the dice. And while I have enjoyed a bunch of recent titles, there isn't anything I'm positively obsessive about, that I look forward to every month. Couple that with several titles that I positively hated last time around, and I'm generally optimistic.
Case in point; while I've been a fan of Supergirl since before I could read, I hated the last model. The origin was terrible, and only part of a ghastly story that failed on multiple levels, and the series that followed it went through creative teams every couple of issues, with no consistent characterization. I've heard recently that it did eventually find its feet, and even the dreadful and inconsistent backstory and characterization was explained away and rationalized. But that's still around forty issues of baggage, not to mention the period where the comic becomes a fourth Superman title. So as far as I'm concerned, the bar is set pretty low for Supergirl to do better next time.