One thing though, StarCraft's space locust arachnoid insectoid monster menaces look way cooler than 40k's. The Zerg are more imaginative in their alienoid scariness than the Tyrannids, which seem to have just one kind of color motif and design aesthetic - those hormogaunts and termagaunts and ghostgaunts and fastgaunts and stronggaunts all look the same. While the Zerg look far more freaky deaky.
I'd have to say bollocks to that, the idea that the nids have one kind of colour motif is obviously wrong, and whats the Zerg alternative? Brown and purple ?
It brings to mind something I recall from an interview with Giger about Aliens Resurrection and the alien queen, "it looks like shit". Its all obviously a matter of personal taste, so I'd say the alien dinosaur-monster menaces of the Nids are much more interesting and varied than the zerg colour scheme of browwwn.
Well, nonetheless, screaming fanatic is the 'generic personality' that GW seems to promote for them, but whatever--rednecks are still cooler.

The "default" Space Marine, or average baseline marine is more or less always an Ultramarine. Screaming fanatic is a difficult label to apply to those chaps.
You know the generic image of a space marine is a guy fairly bereft of the huge piles of bling and so forth the more elite types festoon themselves with, and he's carrying a big gun.