definitely consder teh hobo drifter! one of my personal favorites. i feel like it redefines what a simple perfect rda should be. for such a small atty it has a lot of air flow. i dont mean huge air inlets or ridiculous swiss cheese AF, but it flows very efficiently with high flavor. easy to build and theres tons of top caps for it (single or dual only af, ultem cap, white/delrin cap, black cap with fins/without fins. bf pin is not included but available (when in stock)
noname nopity is another personal favorite. a lot of people consider this to be "too restrictive" for a lung hitter but i think its the perfect amount and the trade-off is FLAVORRRRR. YMMV. also very easy to build. theres also a 'cloud cap' that adds (2) 3mm holes for indirect AF that makes it less restrictive. bf pin included
heres my brief 2cents on the rda's you're interested in:
origen v3 is another excellent versatile-build dripper with a 1.5 ml (roughly) juice well. one of the cleanest designed rda's with really good flavor. bf pin is separate but available.
mb charm is another flexibe rda. best features are the posts/chamber-reducer and the limitless AF options. very exceptional build quality. bf pin is included.
tjt nipple is a personal favorite. since it has no sliding afc adjustment, top cap is simple and domed. deck is similar to the origen. personally i think the afc screw storage underneath is stupid bc it reduces the juice-well depth. other than that its a great rda to squonk with--due to the shallow juicewell. bf pin is separate and hard to find.
hope that helps!
tl;dr get a hobo drifter
