Grohl seems to be a very down-to-earth man who absolutely adores his fans.
About 5 years back, my brother had the chance to meet him one-to-one.
His girlfriend got him tickets through a Twitter raffle from one of the other band members. It allowed them a "back stage pass" to mingle with the press and invitees. When they tried to enter, they were denied by the doorman since they weren't on the list. However, by chance, the band member who raffled the tickets walked past. She recognised him and asked him to intervene so he did, and he asked them to follow him. He took them along a quiet corridor and into a dressing room, where none other than Dave Grohl was sitting, eating a ready-made salad from a plastic container. My brother and his girlfriend sat and chatted casually with him and the other band member for about 15 minutes in the dressing room as he finished his meal. He remembers it as one of the most bizarre and surreal moments of his life, and as something that will always stick with him.