I like the design with the leaf too, but we should not limit the options to it. Perhaps it's too "elaborated" for a simple coin symbol.
In my opinion, the "leaf" imagery may be too gimmicky and not withstand the test of time.
I think you guys may be onto something. This is something I was thinking also, but never really mentioned it until now. Right now incorporating the leaf into the logo makes sense because we're trying to convey its eco-friendliness and energy efficiency compared to Bitcoin, but what about in the future?
What if Peercoin rises to the top in the end? At that point, would there be any reason to still have the leaf in the logo? Bitcoin may be outdated by then and there wouldn't be any more coins that are energy hogs. There wouldn't be a reason at that point to convey that it's eco-friendly, because that might be the norm. The logo wouldn't stand the test of time.
Removing the leaf would put the primary focus on the PP symbol and any messaging that could become outdated with time would be gone. Bitcoin and Litecoin followed this model. There's nothing in the designs that I can see of that could become outdated. The coin logos mainly focus on the B or L symbol without any other messaging that could lose its meaning over time. Maybe we should follow their lead.