Why Trunks?
Why Trunks? Well that's pretty easy. For one thing he's:
1.) the cutest of all the Z fighters,
2.) and how often do you see a guy walking around with violet hair?
3.) He moved the story line along by coming to the past to warn Goku of his terrible fate.
4.) You gotta love how he's so secretive when he needs to be and so forward when he is.
5.) In GT he's one of the main characters and also the president of Capsule Corp.
6.) Some people think that in the episode 'Welcome Back Goku' he's stupid to pick a fight with Vegeta or that he's obsessed with Vegeta's shirt but he just looks at him a lot because his father was killed and he never remembered him well. Personally, I see nothing wrong with that.
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