Troublemaker is a great song, one of my favourite trilogy songs in fact. The very catchy riff more than makes up for the poor chorus, though even that works as it acts more as a bridge to lead the song into the next verse/solo. It has arguably the best solo on the trilogy (though 2nd or 3rd IMO). Sure, the lyrics aren't particularly great, but they still kinda fit the song despite being a little disjointed and all over the place - I still like singing along to it, and it's nice to have a song that actually doesn't really mean anything deeper at all, and just sounds good.