For me, Nemesis and Insurrection are like having a couple of loved ones in prison - I don't want to go back there, but I do. When it's over, I'm annoyed and even a little angry, but I got to see the faces I love.
I just don't know how those two movies were made. Millions of dollars, established/beloved characters, the entire Star Trek universe to work with - and those scripts, to me, conjure the image of a drunkard throwing a handful of #$@% against a wall just before he slips and falls in his own sick.
That being said, I will be watching them both again.