In the uk the ( done to death ) trend is to celebrate the geek being either a hero or a magnet for women. The formula is he must be a bit overweight and have a ginger beard, nothing else will do. Everything from car insurance, breakdown, BT line connection or bankaccounts. About a year ago the trend was to have screaming kids being 'mischievous'. Last summer it was non stop adverts with a festival theme, with entire festival scenes created around chips, margarine and tea bags.
I can't say it particularly influences me in any way and I certainly don't feel insecure or otherwise based upon the advert characters, but I do sometimes wish the advertising agencies would be a little bit more creative.