Ok, I have no idea about pretty much everything on my guitar. Which has got to be pretty obvious. I can play, moderately well I'd say, and that's about it. So here's a bunch of noobish questions, since some of you, especially you Lynda, have made the mistake of letting me know that you know what you're doing.
Pickups- I had single coils, guitar sounded painfully bad. I have humbuckers, they sound pretty good. What's the difference? And is there anything better out there? Answer carefully, because if there is you'll have to walk me through changing them once I have money 
Strings- I've tried a few brands, I love the Blue Steels, and I'm pretty fond of the DRs. Why are there so many completely different sounds you can get from strings? And considering those are the sound I like, have anything that sounds similar for me to try out? This goes for bass as well, I only have one type so far and it's whatever Ibanez does stock, so if you know what that is, and have some recommendations, that'd be cool.
Amps- I know pretty much nothing about them. The not-amps I have are ok, but when I blow 'em, I need an idiots guide to amps. I'd like recommendations and all, but my main thing is how they all work, since they must differently to have so many different kinds. I've read Guitar World a few times, and every amp has so much crap they go over... I'd like to be less lost.
Construction- Back to the GW thing, they go over a guitar, and they make a big deal over what kind of wood it is. I'm sure it'd affect the sound a little, but is it so important? And if it's not just asthetics, I'd like to know what I should be looking for.
I have more questions, I just need to think. I'll let you all work on these first 
HiP QWNS

The north star always guides me
When winter skies are gray
And I wait for sun when all are one
I shall not betray