Well, the rest of the TNG movies were not terribly good (although the third would have made a decent two-part episode, with some judicious editing). I'm also very fond of a couple of the older Trek films, which is why I'd place First Contact somewhere with, say, Wrath of Khan and the one with the whales.

And yes, I totally agree with you that "All Good Things" was a marvelous end to the series. One of the few series ends, I think, that I thoroughly approved of. There's an unfortunate tendency among the writers/directors of long-run series to basically blow stuff up, kill people off, or do other totally life-changing things at the end of their reign. "All Good Things," with its final scenes of unchanging friendship and hanging-out, was indeed perfect.