Is it normal to get somewhat depressed after watching the Star Wars movies?

In every episode of Star Wars, something really depressing happens. In Episode I, Qui-Gon dies, in Episode II, the Clone Wars occur, in Episode III, Anakin becomes Vader, the Jedi are pretty much wiped out completely, and Padme dies. In the original series, Episode IV has the deaths of Obi Wan and Luke's aunt and uncle, Episode V has Vader revealing to Luke that he is Luke's father and the movie has a very dark feel to it, and Episode VI has the deaths of Yoda and the redeemed Anakin Skywalker. I actually like all of the Star Wars movies, despite the flaws in the prequels and think that Star Wars is pretty much the greatest story ever told, but think they are all depressing (as they should be-light-hearted stories usually aren't the highest quality ones).