I think some of us just have a hard time imaging the actual look or feel of a dude singing his a*s off in combat while playing his favorite instrument. Honestly that's all it is for me. I realize that bard is a great class in technical terms, and I think there can be good concepts if you have a skilled and good role players. My problem is that most people I play with must NOT be skilled role player's because I get a lot of elves in tights with rapiers strumming a lite with sing0casting in the middle of combat!
That's hard to imagine. Orcs attacking everyone in the party and I am supposed to imagine them attacking this Bard in melee while he sings his way to victory? Its just somewhat silly to me.
At the end of the day if someone is cool with it that great. Seriously it is. I just have a hard time with the visual. When Im running a serious game and there is a combat that is absolutely desperate and I am doing my nest to translate that desperate serious feeling to the players , then here comes F*ck*ng "Morvin the Magnificent" with his castanets of smiting and dances a jig while relating spoken word poetry....well I think you get the drift...
While I appreciate that bards have been well represented in fiction and folklore, and the 5e bard is a solid class that embraces those icons, I must admit I feel the same way as Brandegoris. I DM our games and I have no problem with one of my players taking on a bard, but I have quietly disdained the class for years. For reasons above.