Alright.. I know this isn't the first thread about this - but since the *********** translation is now out, and doesn't translate it as "streight comma", I thought I would make yet another thread 
So, what I understood from this page
is that the different types of MS determines where your powers excel.
So if we look at Sasukes and Izunas MS, we can see both of them are kinda streight in their design
Now - we know Sasuke is pretty fast, and even though it hasn't been confirmed that Izuna was fast aswell - based on this theory, it would make sense that if he were
Now, Itachi and Madara (and Obito - but that isn't important atm), both got a "swirly" tomoe design
so perhaps this indicated they are the more "technique based" type of MS.
Now if this is correct, there might be several other types of MS. So if you look at Shisui's MS, it's very different from the other designs.
It's quite alot more "squared" and "bulky" - so perhaps this indicated that it's a genjutsu based MS - or something similar
Now the only thing about this, is that then perhaps Itachi's MS should have a design like this aswell, because of his Tsukuyomi.. But as I stated earlier.. It might not determine what powers you're capable of using - but just what core abilities are more powerfull than the others 
I hope you like the theory - and thanks to all the others who've been looking into this matter aswell
So, what I understood from this page
You must be registered for see images
So if we look at Sasukes and Izunas MS, we can see both of them are kinda streight in their design
You must be registered for see images
You must be registered for see images
Now - we know Sasuke is pretty fast, and even though it hasn't been confirmed that Izuna was fast aswell - based on this theory, it would make sense that if he were
Now, Itachi and Madara (and Obito - but that isn't important atm), both got a "swirly" tomoe design
You must be registered for see images
You must be registered for see images
so perhaps this indicated they are the more "technique based" type of MS.
Now if this is correct, there might be several other types of MS. So if you look at Shisui's MS, it's very different from the other designs.
You must be registered for see images
It's quite alot more "squared" and "bulky" - so perhaps this indicated that it's a genjutsu based MS - or something similar
I hope you like the theory - and thanks to all the others who've been looking into this matter aswell