I am, and always have been, proud of my lefthandedness. "lefthanded" or some variation of it is my username on dozens of websites.
I have never considered it to be a handicap - in fact in my chosen profession (I was a computer programmer/analyst/lecturer) being lefthanded was a positive advantage. In the 1990s when I worked on a Dept of Trade & Industry project to register company directors I was one of a team of 9, and 5 of us were lefthanded. Very much at odds, statistically speaking, with the population at large.
At school in the 1950s/1960s I was never forced or even encouraged to use my right hand - lefthandedness was simply accepted. Although I do remember one particularly uncaring teacher (her name was Miss Cochrane and she wore Marje Proops style "devil's eyebrow" glasses) who taught the entire class left and right by repeating the mantra "Your RIGHT hand is the hand that you WRITE with". Myself and the three other lefthanders in the class grew up terminally confused, and I still get confused now often saying right when I mean left, and vice-versa. I'm sure that she never even considered the impact on the lefthanders.
I believe that lefthanders are a bit flamboyant. I was the chap wearing Hawaian Shirts in an office where almost everyone else wore a grey suit (including quite a few of my female colleagues!)