Thanks Scott. It is good to hear someone is interested in this rabbit hole I've chosen to go down.

So, I have a fundamental problem in that I haven't had much time to shoot lately. Work, personal life, family, etc is keeping me pretty busy. But I have had time at different random moments internet a number of different things...
So, I thought it would be interesting to look at how other photographers have built their kits. What do they use.
I actually started with a few people from different forums:
And a few others....But then I decided to check out Canon Explorers of Light (EOL) and the equivalents in the EU. As I am looking at a wildlife lens, I tried to focus on wildlife photographers. For the EOLs, it was easy as I simply looked at each photographer under their "Wildlife" genre. For EU, for some, it was more of a guess, so I may have missed a few there. But, 5 in the US, 5 in the EU, what I hope is a reasonable sampling is summarized it in the following table:
A couple of things jumped out at me:
- 15 mm fisheye?? This is the second most popular lens. Wow.
- Zooms vs Primes. You have to think, these are the types of people Canon is going to be consulting when planning.
- Technically, more primes were owned. But look a bit more closely.
- I do not see a single "holy trinity" of primes, yet most has some version of the holy trinity of zooms (gray).
- Primes are mostly what I would consider "specialty" lenses: macros, TSE and, of course, supertele. I am sure this would change if I looked at portrait photographers, for example.
- There is a difference in favor between most US EoLs and EU photographers.
- Very interesting as this is the direction I have settled in as well: Zooms for most work, primes for specialty purposes.
- Everyone in the US has the 100-400 II. Most owned lens.
- Could be that the webpage hasn't been updated, but there are selective about new lenses, lots of old gear. What was interesting, is I was seeing newer bodies (1DXII, 5DIVs, and 5DsRs). But there were some Mk 1 versions of the superteles. All the 16-35 f/2.8's was the version II, not III, etc.
- There is a real efficiency to most of the kits. Right there around 8 lenses.
As for the supertele lenses I have been looking at:

Couple of interesting things:
- Technically, the 500 f/4 is used more by the photographers I looked at, but really...pretty close between the 500 f/4 and 600 f/4.
- I was surprised to see people still using the 800 f/5.6 as I've considered it pretty well established that the 600 f/4 II plus 1.4TC is actually a bit better. But, 3 photographers in EU still list it.
- Really surprised to see only two people using the 200-400 +TC and only one using the 400 f/2.8 II.
- Not a single 400 DO II
So, if you are interested:
Searched by wildlife under genre---EOLs: https://www.usa.canon.com/internet/p...orers-of-light
EU: http://cpn.canon-europe.com/content/.../andy_rouse.do
Almost done with my rabbit hole. But, off to go kayaking as the thunderstorm threat has passed.