Carbs are abundant in my diet. I pretty much try to eat clean, taking in around 2,200-2,800 calories a day, around 120-180 g protein.
I've had better experience with calorie counting than low carb.
I would say, from the above post and the one prior to it, that you should give it another shot.
If you're taking in 120-180g/day, that's a fair shot.
I take in no more than 120g/day if I can. Anymore than that and I don't feel/look the way I'd like to. But you don't need to go as low as 40g, or lower.
Another poster (Triple H?) was correct in saying there is no such thing as an essential carbohydrate, but in todays world I think it's impossible to function on a long term basis by restricting your intake that low. Not that it's physically impossible, but more so that while you're constantly driving by a Dunkin' Donuts or Round Table daily, it's damn hard to resist pulling over and stopping for a slice at some point.