The reasons why I asking is I've noticed Penny's behavior shows several symptoms of Borderline Personality Disorder & I was just curious if anyone else had noticed it. My reasoning for Penny possibly having Borderline Personality Disorder are as such: Borderline personality disorder symptoms include: * Impulsive behaviors that are harmful to you or to others.Also, you may engage in other impulsive behaviors such as actions that are harmful and destructive to others or to property. Ie Penny's excessive spending risky driving, promiscuous/excessively short relationships, excessive alcohol use, & I think that could include becoming addicted to a online game so much she forget to go into work. *Strong emotions that wax and wane frequently Penny shows quick (and sometimes unexpected) mood swings that last for a few minutes to a few hours. *Intense but short episodes of anxiety or depression The whole Lenard "I love you" aniexty in one of the early seasons. *Inappropriate anger, (intense and difficult to control) that sometimes escalating into physical confrontations. A lot of the time Penny seems to go from happy or any other feeling to angry in a matter of seconds & swing back to happy just as quickly. How many times Has Penny jumped down someone's throat for the most significant reasons. Look at how quickly she got upset at Alicia & got into a cat fight with her over the guys. Or how mad Penny was about prya & Lenard let alone Prya herself. *Difficulty controlling emotions or impulses Pick any episode & I bet you will see her swinging from happy to mad to sad or see drinking or her buying excessive stuff online. *Very unstable relationships. Penny's relationships are usually in turmoil. She's often experience a love-hate relationship with others (especially Lenard). She may idealize/adore him one moment and then abruptly and dramatically shift to fury and hate over perceived slights or even minor misunderstandings. She has continuously wanted Lenard then pushed him away & then get upset if he interested in any other woman again, and again, and again....... *fear of Being Alone Penny seems to have almost a fear of being alone/single or a need to be in a relationship or to have to be wanted But for me it was:e Penny to Leonard's mom:My dad used to call me slugger. But when I got my first training bra I was no longer Slugger!" crying One of the causes of BPD can be emotional or physical, abandonment/disconnection as child from a parent be it real or imaginary. Now don't get me wrong I have nothing against BPD (hell I have been diagnosed with it myself & that is why I can recognize so many of the symptoms). I actually started wondering if their was a connection after seeing so many discussions all over if Sheldon has Asperger's. By the way I can also tell you from first hand experience that Asperger's & BPD are as different as night & day! Trust me with myself habving Borderline & my brother (only 18 months younger than me) having Asperger's I know we're like polar opposites (one very emotional & one very logical)! Still to this day it's still a very penny/sheldon relationship of they may drive you crazy & may make fun of you at times but if things get bad they will be the first one there to try to make you feel better or remind people "Hey! Only I'm allowed to make of them".