The best I can say about "Dinosaur" is that I didn't mind it. I haven't seen the movie for over a year, but I'll do my best to recall what I can.
the movie seemed very focussed on relationships, specifically love-type relationships: The Lemurs early in the film, the single 'bachelor' lemur, and Aladar and his lady friend (is it Neera? I think Ratiasu said it earlier). Overall, it was reasonably well-done, but little more than 'satisfactory'. I didn't have a problem with the relationship aspect on its own. Mostly what I had a problem with was how the film as a whole was executed.
The film had many elements which could have been powerful, moving, suspenceful, and joyful. I must admit, however, that I didn't feel it in this film. I remember I didn't like the destruction scene prior to Aladar's joining up with the Herd, but I don't remember exactly why. Perhaps it wast just uninteresting, like much of the movie. Overall, I just found that this movie couldn't hold my interest very well. It *should* have been good. It *could* have been a masterpiece. Instead...well...I don't know exactly who it was written for, but it wasn't written for me. It is difficult for me to explain since I haven't seen the film in so long, but I just remember it not being as interesting as I had hoped.
Now don't get me wrong; I didn't dislike the movie. Perhaps I just expected more, like an epic movie with huge emotions, great discoveries, great conflicts, powerful scenes, a great soundtrack (I didn't think it was especially memorable. I can't remember it at all now

). When it wasn't there, I was just disappointed. For what it was, it was decent. I just wish it were bigger, better, longer, and cleaner.
By "cleaner" I mainly mean the flow of the film in the last half, and the flow of the film just after the introduction. I wasn't overly impressed with the meteor shower (is that was it was?) near the beginning, as it felt overly embellished (like the deep red colour one would expect in a Grosvenor LBT sequel

) and drawn out too long; it just got monotonous after awhile. The ending felt a little bit rushed and even forced. Again, I don't remember exactly why, but I do remember I was disappointed with the last 15 or 20 minutes of the movie.
I wish I could remember more details, but I do remember that, while it was a decent movie, I wish it would have been more than that. I loved the idea, it just wasn't up to my high expectations is all.