While most of my hobby time during the past year has been devoted to Orks, I still kick around ideas for my DIY space marine chapter. After going through several ideas, I'm starting to see why there are so many people with an Ultramarines army. It's frustrating to have a great idea in mind, only to see it turn to crap once a mini is actually painted (maybe it's just my painting).
The culls include (in various states of incompletion):
The Dawn Breakers
The Granite Guard (these guys might find their way out of the cull pile...not much different from Ultras...but I like blue)
The Ursus Bellum
Other randumb schemes
So after all that, I'm thinking of making my own Ultramarines army, or maybe Imperial Fists. I'd probably get caught up in Red Scorpions if I could afford Forgeworld's resin crack.