Wow, sure a lot of sphincters replying to you. I wish I could say that surprised me.
I'd caution you not to listen to any one person too closely. As you learn more you'll realize that claims about what brand "college educated" people use are ridiculous, particularly considering that virtually every commercial brand is designed by people with at least one degree in the field.
In soil you can use just about anything. If they've got the natural microbial environment any fertilizer that has the right nutrient balance will work. In hydroponics there isn't a soil web to convert unavailable sources of nutrients into available ones, so everything in the fertilizer must be in an available format (which is one of the reasons why those ferts generally cost more). You also have concerns about solubility with hydroponics - better solubility means less cleaning, clogging, etc.
I use Advanced Nutrients. Now undoubtedly you'll get a whole bunch of guys in here to tell you not to do that because it costs a lot. Whatever, make up your own mind on that. You won't hurt my feelings (or anyone else's, I imagine) if you don't like the price. I only bring it up because you mentioned aeroponics, and that's where things like solubility are most important. And the price is really only a major issue if you buy everything they make (which you shouldn't) and don't get good results (which you should).
On the hydroponics side of things, regardless of brand, get a base nutrient and a PK booster or two (I recommend Big Bud, everyone has a favorite). Don't make it more complicated than that. Whatever you use start it at a low dose (1/3 or 1/2 what the bottle says to mix it at) and dial up slowly as the plants get bigger. Watch the leaf tips for burning. If that happens you're too strong on the nutes and need to dial back.