I find nutnfancy and his (admittedly) arbitrary weigh limits to be something of a joke. No offense, it's just that weight has never been a factor for me in terms o fknivds seleciton.
For me, size and shape dictate how and when I like to carry my knives. Never weight. For work, I'll carry my cyclone (something like 6-7 oz. knife) without a care. Sure, it won't 'melt into my pocket' and I won't 'forget it's even there', but I'll be using the knife all the time. I could care less about one or two ounces!
That said, I prefer knives like the Leek or a SAK for EDC lately, since they're smaller and/or slimmer than the Cyclone that I'm used to carrying. They're both fairly hefty knives for their size, I guess