Ok, so I would like to start off by saying that you are a very friendly, trustworthy member of the community, and I highly doubt that if given the chance you would not abuse the PAC program. (Also, by no means am I a PAC expert, everything I say is just what I think of your PAC's, not who you are in-game)
However, in my opinion, these PAC's are a lot like others as well as quite confusing to look at.
PAC 1: This looks very similar to CurlyGeorge's PAC Project 4: Purge Trooper x Nova (V1) which looks pretty good, but way too similar for comfort. You both have the highlighted breathers and sights, however you have added a droid that looks very similar to Greyback's Destiny droid. Both of these look epic by the way! However, once again, a bit too similar for comfort...
PAC 2: This PAC doesn't look too bad, a bit confusing but I can see what you wanted to achieve with it. However, in roleplay I can see there being a massive problem with this. A) Not having a left hand doesn't sound like something a Nova Trooper would not have. B) When using other weapons or anything where the left hand is being manipulated, the PAC will look very confusing. Whilst the simplicity is fine, I cannot see how this one could be used in RP.
PAC 3: This PAC sorta looks like those toys that you buy in a Woolworth's toy section. The colours on the guns do not fit the models at all and, in my opinion, resemble Nerf guns or even waterguns. I really like where you placed the Bacta bombs and the grenades however, that looks really nice. The centre Iron Man looking thing is a good idea, however, if it is not executed properly, it looks very scuffed and unappealing. I don't see what the point of it being there is, other than it just being there with no substantial benefit to RP. *Sometimes less is more.
PAC 4: This PAC actually looks pretty good! I like the effect on the right forearm, and how the droid has a hologram effect when typing (however the green isn't the best colour. Try lowering the opacity of it!). Not a massive fan of the head, but it isn't a major factor. Good job on this one!
PAC 5: I like this one too. I do not have anything to add with this, really nice looking PAC.
PAC 6: I also really like this one. The only things that I am not a fan of is the massive ear piece, but I am sure that can be easily fixed in the program! Again, less is sometimes more, so I cannot see the use of there being a Nova Handbook for dummies. It's funny, but just clogs up much needed render times. Other than that, really good job.
PAC 7: This is also a really nice PAC, nothing to add here!
PAC 8: This is way too confusing. I dont see what you tried to achieve here.
I know this is a lot, but hopefully it helps. Again, I am not a PAC master, but I like to try and help with as much as I can when, and where possible. When you publish your next set of PAC's, I might change my vote. However, for now it will stay at a -1.
Good luck though!
Has taken feedback and has greatly improved his models to show that he has a significant knowledge on how to use PAC. Great job with your PAC's, very creative and they look great!