Wow. This is really a cool thread. Most of ECF is the same info round and round. There's feelings (and frustrations) in this threat that reminds us all of the learning curve. Rant's OK, wookgrower.
I just wanted to remind all of you that it's all subjective and requires real world, hands on experience. What I like may not be what you like anyway. Look around, read up a bit. In the end though, you have to pick a few options and try em. I know it's hard to pick... very overwhelming and confusing on what to get, what will work with what. We sometimes make it worse by just saying "Get an eGo" or "Carto XXYZ is the only way to go". lol. There are plenty of people that got an 808 kit, or 510 kit and have been using it (plus parts) for the last 2 years or more. Others hate those models, and go with big fat batteries and tanks. It's all subjective (well mostly).
The kits often solve some of this confusion since they are bundles of atomizer/cartomizers and batteries and chargers. See what's in them, and pick similar stuff to start with and have spares. Then read up and branch out.
This industry is changing fast, and doesn't have many solid standards in place. If it did, atties and connectors would be labeled and color coded to match devices or some such. It's definitely buyer beware, buyer research, buyer hope-it-works.
I'll offer a tip. Wookgrower is all nicked up now, so he'll like this one........

There is one formula in vaping that comes up over and over. Of course, there are others, but this one is THE formula for figuring out if things will work together. Just memorize this one thing: "Voltage squared divided by resistance". That's all you need to remember for vaping, IMO. You don't need charts, or fancy calculators (you can use those if you want tho). But this formula will give you the amount of heat (watts... like a light bulb).
If you know the voltage of your e-cig (takes looking up if you don't know) and the resistance of the atty/carto (ohms) you know how hot it will be. Most vape between 4 and 8.5 watts. You do need info. It's not that bad tho.
So a 3.2 volt e-cig at 2.0 ohms is 3.2 x 3.2 / 2 = 5.12 watts. OK vape. I vape at 5 volts with a 3.0 ohm atty (5*5/3)=8.3333 watts. Don't let your eyes glaze over. It's always the same equation, the same variables. PER COIL (they have dual and triple coils stuff out now...lol... just to make a complicated thing even more complicated).
Anyway. That one formula will solve 99.99% of your vaping needs. You don't need to know what ohms, watts, volts, amps actually are... just how to use them.
Wow. There's been 3 posts since I started typing. lol. Hope I didn't ramble too much. Hope it helps.
Good Luck!