The game tends to like side views, in that they flicker less (often not at all), but I'm not sure they always give a true flavour - some truck side-ons I've seen are grim (IMHO). BTW if you didn't already know, you can find side views of pretty much any aircraft you want here
http://wp.scn.ru/en/ and of most small arms up to MMG size here
http://www.world.guns.ru/
But why re-invent the wheel? I probably have most of them, so why not PM me with a list of what you're after?
Richard H