On a serious note, I have had a good experience gaining weight. It depends what kind of weight you want to gain: fat or muscle. I would strongly recommend the latter option.
I used to be 327 pounds. I came down all the way to 178 pounds. That was last August. After that I stopped looking at my eight.
Over the last 5 months, my waist size has stayed at 32. I usually look at my weight when weight size goes up.
Then the other day I got on the scale, and I was shocked. I am touching 200 pounds.
Now, I consume 8000 calories the days I work out and keep it under a 1000 on other days. But when I consume 8000 calories, 75 percent are protien ( whey and chicken) calories, 20 percent Carbohyrdrate Calories and the rest 5 percent are Fat Calories (unsaturated fat mostly).
So I went in for a fat-muscle analysis the other day. I have 8 percent Body fat, which is nearly half of the average male body fat composition. Healthwise, I am close to being as lean as possible and have gaine 30 pounds of muscle in 6 months.
Nutrition is a science. Dont play with it. Take it seriously.