I don't really buy TF's i don't like but I guess the way I seperate group A and B transformers are Group A are TF's that are really hard to get in england so I display them on a single shelf glass case in my Living room.
Group B are probably what i have out at the moment and have most fun transforming and they are just on a small shelf.
The rest of my TF's are packed away in their boxes untill i move to a bigger place to display.
Group A20th anniversary Optimus Prime
Masterpiece Megatron (unmodified)
G1 Optimus prime (1982 Takara original)
S-16 G1 Megatron Takara reissue
G1 Starscream Hasbro reissue
G1 Rodimus Major Hasbro Reissue
TFC 18 Soundblaster Takara reissue
set of 4 Takara minibot keyrings : Bumbleebee, Brawn, Windcharger Cliffjumper
G1 Astrotrain Hasbro Reissue
Titanium War within Prime (I like the design)
Group Bthe classics: Megs, prime, jetfire, screamer, rodimus & bumblebee so far
Energon toeline (such a great figure, thinking of repainting it as a classics Ironhide or Ratchet)
Energon Shockblast
BT white meister
BT deadend
Alt Smokescreen
...Actually there is only 1 TF i have that i dislike, Energon Ultra magnus. Its such a brick and i don't even have an Armada Prime to attach it to

. The transforming sound is kinda cool though.