I have lived "abroad" pretty much all my life and I love it. I have been in the UK for over 20 years, then I spent 3 years in the US, then Germany, Austria, Switzerland, Tahiti, Italy, New Caledonia, South America, Denmark,North Africa etc... I only spent 4 years of my 41 years on earth in France which is "my" country and I can't say I feel traumatised in any way.
As a kid I used to be a bit fed up with moving schools every few months but otherwise I did and still do relish all the new adventures, cultures, languages etc... I got to do things most people will never be lucky to do and have experienced different cultures first hand not just as a tourist.
Some places I loved, some I hated but all of them taught me something and even the bad experiences have served me well in life.
After 20 years in the UK I am still baffled by certain aspects of life/society ( like binge drinking ) and some things irritate the hell out of me but on the other hand I find that about France and any other country for that matter.
I has taught me to be more independent, a lot less "proud" of any Nationality, and more respectful and understanding of other people.
When you live abroad ( and travel a lot) you start to realise that people though very different are also linked by a great chain of common human experiences and humanity and it makes you a lot more humble about where you come from . For me anyway.
I am a nomad at heart and wish I could move on all the time. I am experiencing seriously "itchy feet" at the moment and if my fiance could get a job anywhere else in the job easily I would be packed within a day , ready and raring to go...
I do not like being in one place for too long, it makes you complacent and less appreciative of your surroundings I feel.
My idea of heaven would to be able to spend 3/4 years in a place then move on to the next.
Living abroad is exciting, enriching and a great deal of fun. It can be difficult to adjust to certain cultures and environments but certainly worth the try. The world is way too be big and varied to constrain yourself to only one tiny part of it.
I never feel very French at all , not do I feel British or anything else. I am just me and for that I thank my father for dragging me around the world and giving me a love of "otherness".
I am at my most French when food is concerned , but apart from that I love many aspects of France and many others bug the hell out of me. I have no problem acknowledging any shortcomings from the Nation I was born in. As far as I am concerned Nationality is an accident of birth and babies become what we and their environment embues into them.
ALL countries have their upsides and downsides. There are no "best" /"worst" . it is just so subjective.
If I won the lottery tomorrow ( if I started to play that is ! ) there would be no huge mansions, no expensive cars, no diamonds , no private jets for me. Simply travel and live abroad until I dropped !