Wow, lots discussed so far. Bottom line, it boils down to preference and requirements/wants. Some people want/require that it look/feel like a regular cigarette with very little maintenance. Cartomizers and small batteries work for them. The downside is the refill process or the roller coaster ride with the vape consistency. As juice is consumed in the carto, it changes how it's vaporized. You can alleviate this by constantly refilling the carto or topping it off, but that defeats the purpose of having a carto to begin with. I suppose it's subjective, but I didn't get the same flavor or TH out of a carto that I did out of direct drip to atty. However, again, a maintenance perspective comes into play. If you are a chain vaper or unable to drip constantly, direct dripping can be cumbersome. Enter in tank mods or bottom feeds. While these alleviate the requirement of dripping, there's always a risk for leakage. With that being said, I've not had a leaking issue with my MAP yet nor with my REO's. Also, with that being said, I don't play football with my MAP tank or REO in my pocket. The only caveat to a bottom feeder, at least from my perspective, is the learning curve to find the sweet spot in not flooding the atty. It takes some practice (like a day), but it's easy to pick up. A simple look into the reservoir to see when juice is coming up or slight draw while squonking (squeezing) the bottle until a faint resistance (from the juice) is pretty self-explanatory and common sense.
I don't have much info to pass on the UFS/GG stuff since I don't have one. However, what I can pass along is the information I received when I asked some questions on them. UFS and AVS are specific to the GG mods. UFS gives juice flow control (more juice or less juice to the atty) and air flow control (tighter draw or more airy). AVS just gave juice flow control. My understanding (and this may need correction) is that they are for GG stuff only. The AFS is like an AVS (although the parts are not interchangeable), but for anything else non-GG.
In the end, find something that works for you. I've been working on figuring out what I like and don't like, I think it's a bit of a journey. I can tell you, there were brands of cigarettes I did not like, for whatever reason, and finding out what I did like took a little bit of time. As with any endeavor in life, some things work for some people but not all things work for everyone.
If you are getting juice from a pull/draw, there are a couple of things to consider. Don't overfill your carto or flood the atty (if dripping). Keep the tip/mouthpiece/drawpoint perpendicular to the ground, let gravity help you. If it's parallel to the ground, juice will follow the laws of gravity and physics, going towards the force that's pulling it (your draw). If your cartos are dripping wet, try not filling them so much. Try the swing method or the syringe method (highly suggest using the carto condom on the end though).
Oh yeah, wall of text crits you for 19238923 damage!
Sometimes having to fill the tanks for my Ego-T drives me nuts, but that's just because I have WAYYY too much juice and like to use a different one every time... Then I have to clean out the tanks and my syringes. Been trying to fill up a bunch of tanks at once so I don't have to refill for a few days. It's been working out pretty well. Nothing like being out for the entire weekend and running out of filled tanks.
