What Emilia!? I thought Terminator 3 was great, I enjoyed it a lot, but I must say that I enjoyed Terminator 4 more. Terminator 4 had a really good plot imo, because it brought together the whole time-loop plot well where John Connor sends Kyle Reece back in time to save his mother in the first movie, which turns out to be his father. Plus, Terminator 4 had great actors like Christain Bale and Sam Worthington, I thought that they portrayed the post-apocalyptic world very well in that movie. Terminator 3 was a bit of a let down in the sense that it didn't have such a complex plot that Terminator 2 did, but I thought it was still a very decent movie and a good tie-up to Judgement Day being delayed and everything and some of the action scenes in Terminator 3, I thought were pretty epic.
I don't think that the fourth movie spent too much time on Sam Worthington's character in the movie emily, because he was a pretty integral part to the whole story of the fourth movie. Just because the entire movie wasn't centered around John Connor isn't a bad thing imo, it was all very good for the development of the plot of the movie imo.