Join Date: Aug 2013
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I recommend linnies as well. I haven't owned a green cheek, but have fostered one and interacted with many. I also currently own a parrotlet and a budgie in addition to a linnie. If I had to compare using the reference of these four species, I'd say linnies are more like budgie and green cheeks are more like parrotlets. I say this because I see linnies as playful like budgies but not as bold and much more cuddly. While green cheeks tend to be more outgoing and playful than parrotlets, they can also be nippy and moody (which is more similar to parrotlets than budgies or linnies).
Here are some rankings for you based on my experience:
Loudest to quietest: Green cheek, linnie, budgie, parrotlet
Messiest to cleanest: Green cheek, linnie, budgie, parrotlet
Most aggressive to least: Parrotlet, green cheek, budgie, linnie
Most to least as far as being cuddly: Linnie/green cheek tie (depending on individual), parrotlet, budgie
Most energetic: Green cheek, linnie, budgie, parrotlet
Most playful: Linnie/budgie tie, green cheek, parrotlet
As far as training, they are all trainable. Budgies and linnies are the best talkers of the group, then parrotlets, and last green cheeks.