Though TFs have been my primary love, I have a plethora of other things that routinely tax my toy budget in the following order of priority (and what is actually displayed):
Lego- (displayed) System sets, Bionicles, and a few Mega Bloks series, the current being Neo-Shifters.
Power Rangers-(displayed) I have a tidy collection that dates from the original to current and nearly takes up the other half of my toy room.
Zoids- (Displayed) Have most of the sets I wanted already. Haven't the room for more. Still want that Gilvader reissue though. Have the 7 large scale vintage Z-Knights that used the same engineering, but are humanoid mecha.
Cybotronix- (Displayed) Motorized robots of varying sizes made by Hap-p-Kid toy group. Love these guys!
Collections that I have that I consider complete are:
Vintage Micronauts- (Still in boxes) Have all the original Megos (except Lobros, Chronos, and some of the more exotic stuff that came out after the aliens), a lot of Japanese reissues, and some vintage Takara stuff too. Have a nice collection of Neo-Henshin and 99 Henshin Cyborgs as well.
Gundam toys- (Still in boxes) American issue figs, vehicles and some model kits, all the way up to Seed.
GI Joe Sigma 6- (Still in boxes) After the tragic loss of my original 80's Joes this series filled the gap pretty well. Stopped collecting Joes again after Hasbro canned the 8 inch figures. Will not invest in tiny 3.5 figs made out of bendy-plas at 8 bucks a pop. WILL NOT!!!
Exosquad- (Displayed) One of the most awesome toy series of the 90's. Too bad Playmates killed it off by shoving Robotech down its throat. The two did NOT go together.
Beetleborgs- (Displayed) Only the borgs and the vehicles as seen in Tokusatsu. None of that idiotic American Hillhurst monster crap!
MOTU 2000- (Still in boxes) Love the line, hate the incompetents at Mattel for murdering it.
Needless to say, a lot of this stuff is in boxes awaiting the day they can be displayed. It will be a nightmare if I ever have to move!
