I. Type-A personalities Gone Horribly Awry
The Perfectionist: Appears perfectly normal, but closer inspection reveals a well-stocked reed case in a complex yet perfectly logical order. The zip-cover to the oboe case is immaculately clean. The oboe keys are polished until your mom could do her makeup looking in them. Has the nicest folder, too. Knows how to make their own reeds. Has been section leader since their freshman year, and has contempt for the schlemiels in the section and the band.
The Overachiever: The kind who makes Districts, All-State, etc. To excel on the hardest instrument in band is the crowning achievement of their lives. All the traits of the Perfectionist are found in the Overachiever. The overachiever is usually also driven to excel academically. (So you have more than one reason to resent them.)
Both the Perfectionist and Overchiever, unfortunately, run the risk of early demises. Their Type-A personalities, paired with their (near-constant) oboe playing, increases their risk of aneuryms.
II. Self-Image Issues
The Self-Doubter: Berthiaume syndrome, after Dave Berthiaume, the archetypal sufferer. Loaded with talent, the self-doubter denies having any. The self-doubter will freeze when nervous--which is whenever anyone else is around when they're playing.
The Cry-For-Attention Oboist: They picked up the oboe to be different, weird, and cool. (And because dyeing their hair green was so unoriginal.) The punk-ass of the oboe world. (The table of contents has a link to the site of an oboist of this variety.)
II. Addictions & Codependency
Type 1: Usually an oboe draftee, the oboist does not particularly like the oboe. However, they do not (or perhaps cannot) quit. They may even want to buy a new, better (and very expensive) oboe.
Type 2: A very sick individual, this oboist picks up the oboe to fill an emotional void, thinking the oboe will make them happy and "complete". There is a blissful honeymoon period that can last more than a year. Then the oboist hates the oboe, yet they rely on it for their identity. The oboe, then, becomes an extension of the oboist's self, and the loathing of the oboe an extension of the oboist's self-loathing. (As I said, this is a very sick individual...Alas, this is me.)