This is a banner for discounts for restaurants, i like this banner because of how simple it is and of the choice of colour. the black helps to draw your eye to the picture of the food which makes it easy notice.

This a banner for a website called MarijuanaVaporiser.com. i don't like this one mainly because of the purple background, the yellow "BUZZ" and the black and yellow lettering. personally i think that the colours clash which makes it ugly.

Here is a banner for a sports gear website. this another good banner, the reason for this is because of the short animation of a boxer, it is nothing obnoxious so it doesn't become annoying. i also like the cool background colours which blend in nicely.

This an advert for a self-defence website, personally i think this ad is a bit over dramatic and sinister. even though something like this would work it just seems like too many scare tactics.

Finally, this an ad for bathroom surfaces and sinks. I personally dislike this one because of the way its layed out and the sky background which makes it look tacky. also the way the products are displayed makes this ad look strange.

http://www.angelfire.com/super/badwebs/
http://www.bannerworks.co.nz/your-guide-to-advertising-online/what-type-of-banner-is-more-effective/