it depends on the genre. and also like, we could talk about all time favorite and then like, current favorite. the band that was important to me during a certain time of my life. i could list some bands.
in elementary school i was all about the boy bands
middle school i was obsessed with jesse mccartney and still support him to this day
high school i was into the jonas brothers
college was all about honor society, all time low, we the kings, dashboard confessional. i basically went to a show every weekend (i lived next to a few venues)
i'm currently loving bruno mars and twenty one pilots