1) Kinda useless technique to me, unless your in close combat and want to head for a quick kill, you can quickly use this an aim it at the neck.
2) When using this, it will make me feel like a real ninja, you know stealthy things and all lol, but this is useful for when you are in the midst of an intense battle, most opponents will just see a simple windmill shuriken coming, and won't notice the other one, like what happen to itachi and zabuza.
3) A bit useless in a battle to me, unless you have people protecting you. For you need to stay focus on the animal, and it you are fighting someone and they summon a boss or any regular animal, and you use this the ninja won't give you any mercy and simply use that as an opening to kill you.
4) One of the best low rank techniques in ninjutsu in my opinion. I will definitely use this now and again when i don't want to prlong a battle to long. Too bad it only works for two less ranks of me, so being an official sage would help me out

This isn't really useful in attacking multiple enemies from far though, unfortunately.
5) Would be better if it work in long range, but is good in close combat it's good to hurry distract the enemy, so i can use the hidden needles.
6)A nice technique indeed, and can damage multiple enemies.
7)For quick attacks on an enemy, saw this being used by the raikage, pretty awesome if used correctly

8)Used by a fellow member of my village recently, gecko. I like this technique, it gets an enemy off guard, as he will be confuse and think that the voice is coming from some where else
9)Seen used by the great zabuza, very good technique when fighting in a crowd and being an underdog, and once you used the hidden mist jutsu this will be nice to finish off several enemies.
10) Sucks how it only works for female bios, but none the less it is good to hurry trap an enemy, and do a quick kill.
11)great for diversions.
12)since this is a D rank jutsu, i will figure that the ropes ain't that strong and will only work good against an weak ninja
13)To me this is just used as an distraction, as it will play no role, especially against uchihas
14)I like this and the killing intent the most so far

this is used to make the shuriken larger, which is usefull because it will cause more damage if contact is made
15)Nice, this is good too to cause more damage, possibly inflicting damage to multiples enemies too
16)I like it, but it's kinda confusing