Although I think Nemesis was a deeply flawed film, I actually thought the part about Data's death was tremendous. In a way, it's the ultimate completion of his character arc in his quest to be more human--what could be more human, after all, than making the decision to sacrifice yourself to save your friends and loved ones?
A great many people compare it to Spock's sacrifice at the end of Khan, but I actually think it's the exact opposite: Spock sacrificed himself because it was the logical thing to do; Data sacrificed himself because it was the human thing to do.
Nemesis is dreadful on so many levels! It is really hard for me to restrain myself but I better do because when I start it would be difficult to stop.
Datas death annoyed me immensely. First of all, I remember what especially actor Brent Spiner said, Data has to die because he can`t play him indefinitely. What arrogance and short sightedness! First, Data is an Android. Even a female actor could play that character. Second, aging is not a problem. Data even tried in the past to look older (ok, it was a clumsy attempt, but nevertheless) in order to better fit in with his mortal friends.
My first thought was, sarcastically, great, Brent Spiner got his wish after all - and for what? Data was a character with enormous potential who was sacrificed for shock value.
I didn`t feel any sorrow, any loss at that time - I first of all was annoyed at this decision and the clumsy execution of it.
What happened reminds me a bit of a scene between Q and Worf: "What do I have to do to convince you that I am human?" "Die". (something like that)
It was a cliche so much into the face, I didn`t feel anything noble happened here.
OK, I stop now.