Optimash takes up a lot of space on my Prime shelf, so I put him with Darth Tater and the Spud Trooper in the other room.  This opened up enough space to add a number of other Primes to the shelf.  So, from left to right...

Back row: Star Convoy, 20th Anniversary, Cybertron

Middle area: Nucleon Quest, Robo-Vision, Movie Leader, G2 Laser, Alternator

Next row: Takara Reissue #0, Movie Protoform, Rock 'Em Sock 'Em lollipop holder, Target giftcard, Takara Pepsi, Action Master

Front Row: Spychanger, Optimash Truck, Rodimus (from Star Convoy), Titanium, Choro-Q, Robot Hero (wave 1), Movie Legend, Head lollipop holder, Robot Hero (wave 2)

And that's still not everything I own.  I may have to look into getting Prime a bigger shelf.