David "Beef Jelly" Winfield, one of the Kings of Cathcphrase Comedy. It's gettin' phrase-y up in here!
I've never had a PB&J burger but my wife is a fan. There's a local place here that does one at one of their locations that she's gaga over. Actually upon review I must correct myself; no PB, but goat cheese and blackberry jam.
I tend more toward spicy or savory. Bacon, eggs (obvi), hot sauce, a good garlic or chipotle mayo, jalapenos (especially fried), onions (sometimes), barbeque sauce....not all at once, mind you. Lettuce can be nice if the lettuce is fresh and the burger's not being delivered (your lettuce gets all warm and saucy and it's awful). Pickles, but only dill pickles. Sweet pickles can go to hell.
I'm also a huge, huge believer of the mustard and mayonnaise combination. Next time you roll through Wendy's. get a Baconator but sub mustard in for the ketchup. It's a game changer.