A lot of the Star Trek: The Next Generation figures are on the happy side of worthless, but the popularity of Q keeps him slightly above worthless. As characters go he's generally beloved and largely undermerchandised. Playmates has 4 4 1/2-inch scale figures, so you can go snag those if you like.
The 5-inch figure is quite tall relative to other figures, and is mostly new parts. Note he doesn't have a tricorder holster, and his hands are posed to... I'm not quite sure what the intent was. He can interact with the accessories, which make sense from a symbolic perspective but don't literally make a lot of sense. Q didn't literally have the Enterprise or Earth in the palm of his hand - metaphorically, sure, so why are they here and purple? He doesn't really need gear - the character himself is everything you need, so the added gear is just a nice bonus.
The taller figure got new sculpted parts. Even "Duty Uniform" Picard had a painted-on pip on his collar to show his Captain rank, while Q has four fully-sculpted pips. His pose is relatively normal - the arms are a little weird, but this isn't a figure designed for armed combat dioramas. He's just around to monologue at you or turn you into a barking dog.
With 12 points of articulation and a pretty good sculpt, this is a figure you should probably get if you get a kick out of Q. He looks decent, stands just fine, oh - and there's a variant. Some of them have the face molded in flesh plastic with painted hair, like this sample. I actually found this one in a case at Toys R Us along with figures with hair molded in brown, and the face flesh was painted on - those didn't look as good. As such, take a good look at his face when making the purchase to ensure yours looks the best. The people at Playmates painted his lips, eyebrows, and there's even a light outline around his eyes. This figure isa lot more lively than other figures of his day - and ours, so go ahead and get this one. He's a good one.
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