The other side of the coin in the lose it gradually camp is the psychological effect when you get to a difficult goal. There is nothing like it. You feel so proud.
Doing it gradually will upset you as most of the time you want it to come off quick without the suffering, and pack on a few more pounds in the process.
I ballooned in weight as I had my world caved in Jan through April, I was very miserable and I ate the crap just to feel better. Like I said it the pounds just crept up.
To get that goal read the Atkins Diet, and just stick to Induction, everything else is a fallacy and will lead you back to pigsville faster then you can say truffle. First two weeks is murder.
You feel good on the 4th week and you must keep a trophy visible to remind you how bad you were. I have two. My old pants size 46L and a picture of me looking like a..

...pig.
Your mental state is very important while going through this critical weight shedding process. My crutch was the arcade gaming. My poor xbox1 & X Arcade got more action last month then ever. Even more now that Coinops2 is out.
These things keep you on the short and narrow. No pain no gain. Yes my doc was pissed, yes I'm going to get it in the neck from him next time I see him, but it is worth it all.
I also noticed that the girls are starting to notice me again. Bonus. Nothing wrong with that. Tell everyone what you have accomplished to encourage others to get healthy.
So if you have a few 100 lbs to shed, don't listen to the old women in here. Just dive in the deep end and make a difference. Just get rid, before you become insulin resistant.
Here is a odd thing that happened to me just last night. I don't weigh myself daily just weekly as your body weight can go up and down. I weighed in at 238 Monday night. Thinking that was odd as I Weighed in at 230 the previous night. I had a full 8 hours sleep, and when I woke I was back at 230. Where did the 8 pounds go? I figured 2 litres of water passed through my system (yes I drink that much water a day) so that's roughly 5 pounds there, so what about the other 3 lbs? I'm definitely going to hit that brick wall and plateau real soon, but the runaway train is still on its tracks.
How did I lose 3 pounds in less than 9 hours?
