Hey I wanted to point this site out to people as they really have some awesome midi packs. I mean they cover a fair few styles and if you suck at music at music theory this could be just the tools you need. I mean wether its chord progressions, bass lines or big euphoric trance melodies, they have it all. Its all royalty free and it aint too expensive.
I really reccomend this site, so go check it out.