C) XB1 users are still very much rooted (from XB360) as primarily being diehard 1st person gamers... while, everything else is secondary (see below).
Just out of curiousity redoing your list in genre terms.
Amazon’s Top 100 Best Sellers of 2015 (06/13/15)
12. 3rd person action PS4
16. Shooter PS4
21. Shooter PS4
23. Fighting game PS4
29. Shooter XB1
32. Shooter XB1
33. Shooter PS4
36. Shooter XB1
37. Sports PS4
39. RPG PS4
45. Sports XB1
47. 3rd person action PS4
48. 3rd person action PS4
49. Shooter XB1
51. Shooter/3rd person action PS4
53. Shooter PS4
55. Shooter XB1
66. Shooter PS4
70. Shooter PS4
80. Sports PS4
82. 3rd person action PS4
83. 3rd person action RPG PS4
88. Shooter/3rd person action XB1
93. 3rd person action XB1
96. Same game as #12 PS4
98. Shooter XB1
Shooter being anything with a large focus on shooting things from first or 3rd person. 3rd person action being anything action oriented that doesn't focus mostly on shooting things.
Shooters - PS4 (6.5), XBO (6.5) Tied.
3rd person action - PS4 (5.5 - one of which was platform exclusive), XBO (1.5) Winner PS4.
Fighting games - PS4 (1) winner.
Sports - PS4 (2), XBO (1) winner PS4.
RPG - PS4 (2), XBO (1) winner PS4.
It's obvious Shooters are equally popular on both platforms with no platform associativity from this first glance. Meaning Shooters are identified with PS4 just as well as they are with XBO.
Looking at the other genre's it's hard to tell, if the list were longer you'd have the same ratio's minus the platform exclusives. Looking at ratio of titles per console, PS4 has 16 versus the XBO's 9. Take out the equally popular Shooter genre and it's PS4 with 9 versus the XBO with 2. If you don't categorize Dying light as mostly shooter than it's PS4 with 10 versus XBO with 3. BTW - I'm not going to count bloodborne twice.
Not a lot of room to see how other genre's would fare on that platform.
Since XBO only has 9 titles in that list. How about we limit it to the top 9 titles on each platform? It's limited but makes it more comparable. As well since we have no idea if Bloodborne would have replaced one of those 9 XBO titles (I personally think it likely would have as everyone I know with an XBO only would have bought it if they could), we'll leave that out of the comparison as well.
Shooters - PS4 (3.5), XBO (6.5) - when you narrow the qualifications enough there is certainly a preference there.
3rd person action - PS4 (2.5), XBO (1.5) Not much difference in that genre.
Fighting games - PS4 (1), XBO (0) - PS4 - note below...
Sports - PS4 (1), XBO (1) virtually no difference.
RPG - PS4 (1), XBO (0) definitely a preference on PS4, at least in this limited sample.
The fighting one is a bit complicated, no? As the best or at least one of the best Fighting games available on XBO that gets a lot of play is also F2P and only available digitally. If were available for sale it probably wouldn't change much as the title has been out a while although it gets constant updates in content. However, it's existence may or may not have take away enough sales from MK:X to make it not not do as well. It'd debatable either.
Anyway, that was an interesting exercise, at least for me.
Other people probably found it less interesting. What would have been more interesting would be to compare the top 20 titles on each platform. Even more to compare the top 20 multi-platform titles on each platform. Even then we'd see interesting interactions. As titles like FIFA and Final Fantasy almost always do better on the PS brand. While COD does generally better on XBO, although when compared to their install base, is roughly equal in popularity on both platforms. The same goes for Battlefield and most other multi-platform shooters.
Anyway, while interesting. Genre's (rather than specific titles) being associated with one platform or the other appear to become less and less relevant as time goes on.
Regards,
SB