Like Decneo said, it really depends on what type of games you like to make. If you're into horror, (which i am), then MPs 22, 23 and Zombie Apocolypse would be good choices. If you like fantasy/ancient, then MPs 17, 28 and 42 would be pretty good. If you like modern/urban, then i would probably recommend MPs 31, 36 and 38. Or if you like a number of themes, you could go with a mixture of model packs. Of course it's all up to you, so just choose whatever suits you.
Cheers, Jake
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-The Marsundle Residence- (Coming Soon)