with his charisma and laid-back personality. This is seen in his success with women and employers. He has been described as a "hipster doofus". Although he never holds a steady job, he is rarely short of money and frequently invents wacky schemes that often work at first but eventually fail. Kramer is friends with Newman, and they work well together despite their differences. Recurring Many characters have made multiple appearances, notably Jerry's parents, Morty and Helen Seinfeld, who reside in Florida; George's parents, the overbearing Frank and Estelle Costanza; George's on-again, off-again fiancée Susan Ross; Jerry's Uncle Leo; Elaine's variety of bosses, Mr. Lippman, Mr. Pitt and J. Peterman; Elaine's on-again, off-again boyfriend David Puddy; and Kramer's friend, Newman, a mail carrier who lives in the same building and is Jerry's nemesis. In addition to recurring characters, Seinfeld features numerous celebrities who appear as themselves or girlfriends, boyfriends, bosses and other acquaintances. Many actors who made guest appearances became household names later in their careers or were already well known. Seinfeld's girlfriends A number of actresses made guest appearances as Seinfeld's love interests in single episodes: Isabel (Tawny Kitaen) – "The Nose Job" (season 3, episode 9) Nina (Catherine Keener) – "The Letter" (season 3, episode 20) Marla (Jane Leeves) – "The Virgin" (season 4, episode 10) Sidra (Teri Hatcher) – "The Implant" (season 4, episode 19) Amy (Anna Gunn) – "The Glasses" (season 5, episode 3) Jody (Jennifer Coolidge) – "The Masseuse" (season 5, episode 9) Jane (Jami Gertz) – "The Stall" (season 5, episode 12) Meryl (Courteney Cox) – "The Wife" (season 5, episode 17) Jeannie (Janeane Garofalo) – "The Invitations" (season 7, episode 24) Ellen (Christine Taylor) – "The Van Buren Boys" (season 8, episode 14) Jenna (Kristin Davis) – "The Pothole" (season 8, episode 16) Beth (Debra Messing) – "The Yada Yada" (season 8, episode 19) Valerie (Lauren Graham) – "The Millenium" (season 8, episode 20) Lanette (Amanda Peet) – "The Summer of George" (season 8, episode 22) Patty (Lori Loughlin) – "The Serenity Now" (season 9, episode 3) Sara (Marcia Cross) – "The Slicer" (season 9, episode 7) Plotlines Many Seinfeld episodes are based on the writers' real-life experiences, with the experiences reinterpreted for the characters' storylines. For example, George's storyline in "The Revenge" is based on Larry David's experience at Saturday Night Live. "The Contest" is also based on David's experiences. "The Smelly Car"