So, I know I'm about a week late to the discussion, but it sounds like there was SERIOUS discussion about the SERIOUS nature of SERIOUS running races which evidently excludes the non-SERIOUS runDisney races. Here's my two cents...
When I have heard or seen people mention rD races as being "non-serious," I don't take it personally. Instead, I translate it as meaning "non-competitive," and so I agree... this non-competitive atmosphere is precisely the reason that I really enjoy rD races:
1. I love that each runner isn't looking around at the competition, sizing each other up, trying to figure out who's faster than whom, or playing surge games during the race.
2. I love that there is no prize money for the winners. Participate only for the love (or challenge) of running.
3. I love that this non-competitive atmosphere encourages so many folks to become first-time runners and try things that they never imagined they would do.
4. I love that the relaxed atmosphere allows complete strangers to talk and bond in the starting corrals instead of mentally readying themselves for the battle about to take place.
5. I love that the character stops, or video screens, or DJs, or 1/4 mile long string of speakers on the side of the road provide entertainment all along the route (regardless of whether you stop along the way or not).
6. I love that everyone is so encouraging of each other out on the course. Sure, this exists at other races, but not to the same extent (at least from my 30ish years of running experience).
7. I love that Jeff Galloway and his running method, although not considered the most competitive approach, is front and center given the proven benefit for so many runners over the years.
8. I love that you get to run through the theme parks (which are places meant to take you away from all the seriousness of the world). By definition, this shouldn't in any way be a serious event. I like that it seems to be more of a celebration, and that is fitting for a running event given what it often takes to get to the starting line.
9. I love that people are happy there.
All that being said, this non-competitive atmosphere does not prevent you from trying for a PR if you are so inclined, nor does it prevent you from going for the win if that is your goal. You don't have to stop for the entertainment; you don't even have to pay attention to the castle as you run right through it. As many have stated, it is your race to make of it what you want. What you likely won't get is some fierce competitor staring you down as he/she passes by, and I'm okay with that. I'll take the friendly smile, the simple "hello" or "good morning," the words of encouragement, and the occasional laugh as we make our way towards the finish line: a common goal we all share instead of the place to which one of us is trying to beat the other.
Sure I run many local races during the year, but I specifically run [space] Disney because it is a different race, and the differences mentioned above make it much more fun that any competitive race in which I've participated.
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Not really sure what my above comments have to do with the OP.