Sure, as a kid it would have been great to dress up and get given a lot of free chocolate by people. Well, actually, maybe not so much the dressing up part. We weren't really a "dressing up" family. Infamously, one year when I was about 5 or 6 (and my Mum is probably going to cringe hearing this brought up again), for the school Book Week my older brother got kitted out as Biggles (fictional ace fighter pilot) which included having the plane built around him, whereas I (the family's limited energy for That Sort Of Thing having been exhausted) got to go as The Paper Bag Princess. In case you're wondering, to the best of my recollection, that involved cutting a neck-hole in a heavy paper rubbish sack and sending me off to school in it. I couldn't sit down in the thing all day. Apart from school plays, I remember dressing up one other time as a kid, which was Pippi Longstocking (also for Book Week, I think). I can't remember what Pippi Longstocking wears exactly, but I think it consisted mostly of stripey tights and putting my hair in plaits with wires in to make them stick out. So yeah, not really ones for going all out in that department.
But even as a kid, I was aware of Halloween from books, and I honestly don't remember feeling like I wished I could take part in it. Sure, I wished I could be like Claudia Kishi with exotic-sounding American "candy" stashed all around my room, but I never remember wishing to acquire said candy at Halloween. (How I longed as a child to be eating HoHos and Babe Ruths and whatever else you have. Then I grow up and discover almost everything has peanuts in it. Gross. I have a (stupid) theory that the chief cultural divide between Europe and the United States is that, in America, everything has peanuts in it, and in Europe, everything has hazelnuts in it...) If anything, I wanted to be a little English girl enjoying Devonshire teas and lashings of ginger beer on the lawn, not a little American girl going trick or treating and watching out for razor blades in my apples (seriously, what kid wants apples if there's chocolate on offer anyway? It's like how my Mum and Dad - sorry, Santa - used to put an apple and an orange in my Christmas stocking because that was a treat when they were little. War's over, Mum and Dad!).
And as an adult, the whole idea of Halloween (other than strictly adult-only costume parties involving lots of booze - and even then, I still don't really have the dressing-up gene) appalls me. I'm going to sound like the Halloween version of the grinch, but I don't like children. The idea of having troupes of them coming to my door and demanding MY chocolate is the stuff of nightmares as far as I'm concerned. (Now I probably am going to have a nightmare about it and wake up screaming, "My chocolate! My chocolate!" and chewing the pillow.) And the whole idea of 'trick or treat' is really offputting. I don't know whether in real life people actually go around egging houses or throwing toilet paper in trees like in the movies, but the underlying concept of "give us stuff or we'll exact our revenge" is horrible. It kind of reminds me of the tipping thing - again, I expect in real life it's not as extreme as you see on TV, but the whole trope of the badly-tipped waitress spitting in your food or your mailman breaking your packages etc. is just nasty from where I'm standing.
As with most aspects of American culture, Halloween seems to be catching on more and more at home (at least when I left). Next thing you know we'll be celebrating Thanksgiving... Of course I don't think this is any sort of deliberate cultural imperialist ploy by the average American citizen - for one thing, my English Dad (I don't have an English Dad and another Dad, just to be clear) has stories of carving turnip lanterns at Halloween as a kid (much to the general mirth of the family, who think that's about the most country bumpkin-ish thing we've ever heard) - but it is in the interest of American (and other) manufacturers of chocolate, decorations, costumes etc. to rope as many people around the world into these things as they can. Add in all the American films, TV, and books and Halloween just becomes normal to the younger generations. Well, fun as it may be (and I don't begrudge anyone else celebrating it, nor am I saying that I am anti celebrating it myself) it's never been an important thing to me, and that's why I've never felt cheated out of growing up with Halloween.
(PS I feel I should say that I realise this might come off as anti-American - it's not meant to be, I respect you have your traditions and that Halloween isn't a purely American invention anyway, I'm just trying to explain my cultural perspective on things. Also, this isn't aimed at any specific person, I've just heard it a lot over the years that French people are missing out on Halloween, or I've missed out on Halloween, so this is just something to think about if at this time of year you're looking around you at the lack of Halloween celebrations here in France and thinking "oh those poor kids". It would suck to be the one kid out of everyone you know who's not participating, but if no-one is, I don't think you really care.)