Maybe I am mistaken?
What I think I see is you trying to be humours (in ways)?
I don't think any distros label themselves "MS Killers" that comes from writers, bloggers/responders or their editors specious headlines.
Do you still use Linux in you day to day work & Play?
I too started to play with Linux in '94, started using it on servers & appliances in '97 for commercial web sites, '01~02 as my primary desktop/laptop/workstation tool.
10. Security
While I have heard of these (that you mention) I have no direct experience.
Depending on one's need/use, there is SELinux, or just a properly set-up firewall. iptables/firestarter etc (of course there is more, if needed)
Still if for a network, a stand alone appliance maybe appropriate.
There are things like, ClarkConnect, IPCop, etc, or devices like the Yoggie gatekeeper/pico, etc, all of which even help secure Windows & Mac systems as well.
9. Super-specialised Distributions
Why you mention Zenwalk in this category I am not quite sure?
GeeXBox has developed into a good media/htc system as well as something for the Xbox.
8. Minimal Desktop
I generally agree, yet some may find them useful or a better fit, then building or stripping from scratch.
7. Foreign Language Distros
Why worry if they don't fit your need.....
At one point I found Parsix (an Iranian Distro) to be the better Live Debian distros.
6. Create Your Own Distribution Distributions
Some of these like LFS is more for the learning experience.
Others have tools to remaster & create your own specific live CD/USB like DreamLinux (Brazilian)
5. Unfinished Symphony Distros
Not sure what you mean by Symphony? I would guess you are not talking about the Symphony DE, but a complete system. Like maybe Sabayon or others?
4./3./2. Embedded/Mobile/Appliancees
These are all relatively the same, and unless you are a developer/hacker/DIYer you would use the device as is. Phone, Smartphone, GPS, DVR, TV, Router, home automation, etc, etc.
1. MS Killer
As I said before, none are presented that way. Yet many can be an alternative for many to MS, if made aware and had parity in the market.
So in summary
It looked like you were complaining about the variety of Linux.
Maybe I took you too seriously and it was a tongue~n~cheek look at some of the Linux advantages.