Oh, and the reason for me picking those two [other than the fact that I like them] is because of the story behind them. Dream On is probably the first rock song that I ever heard that I liked. I was like 5 years old. When I heard it again on the radio at like 7-8 years old, I asked my dad what the name of the song was, etc. From there, I started to look for more rock bands and rock songs... and that basically led to me loving rock/blues. Hells bells is a similar story.
But like crys, Idk if I can pick one favorite song. I have over 100 that I can probably say is my favorite song depending on my mood, the day, etc.