Just a few general comments on the discussion:
1. "Telling it like it is" really only means being honest. Being nasty about it is a personal choice

. Like if I ask Jessica Alba about what I am planning to wear and she says "Those colors do not match and look bad together, you should choose another shirt", that is telling it like it is.
Saying "You look like an idiot in those colors, change before you embarass yourself, me, my family and every other male on the face of the planet, even blind people!" is doing it in an unneccesarily rude way and obscures the message that is trying to be conveyed. let's not use "telling it like it is" as a license to say it rudely.
2. I find the disucssions where we tell others what would make them sleep better at night amusing. If you are in any position which keeps you up at night or has you sick to your stomach while holding it, then get out immediately as you should not be in that position to begin with. I sleep fine at night with my credit spreads because I have confidence in my strike selection and loss limitation measures (futures, partial hedges, etc...). I cannot perfectly hedge the position because it is not a risk-free trade but by not putting all my eggs in one basket, I know I will never blow up entirely. So I sleep fine

. I get a little stressed at times on certian positions but so does every trader on their portfolio and that is normal. I would actually be more stressed watching my portfolio shrink month after month on losing debits waiting for the move. Just a personal preference. Trade the strategy or approach that best fits your trading approach. No law says you have to lose everything on an adverse move or even sit by and let it take you out.
3. For the strikes that I personally choose and they way I manage the trades, the credits are better for me than the debits. Based on last year, I would have made no money or lost money if I did debits at the same strikes instead of credits. Intraday, they never really got juiced at all and who is to say I would have gotten out at the higg point of their premium. Every spread I sold last year never was ITM at any time and even the 2 adjustments I made, did not cost a lot of money to buy back. In fact it would have brought in less to sell if it were a debit given the SPX b/a spreads and with the debit bleed I would have had all summer I would have been close to flat I think. Not making a generalized statement on credits v. debits, but in my strike selection and the way I manage the trades, the credits work best for me. Credit and debit spreads are the same in theory but in SPX practice they have been quite different in my experience. So for me I got to stick with what works.
As I said, with SPX it does not make sense given the costs and skews on the put side but anyone interested in the debit positions should look to SPY or XSP.
4. Finally, assuming the belief and the generalization that the positions are the same leads to me ask then why one has a preference to argue for debits over credits as opposed to saying you could do either and it would not matter? One has to assume that debits would be held until they reached their maximum value to get that nice windfall to me is as erroneous as assuming i would hold my credit spreads until they hit the maximum loss.
Moreover, assuming one would get out early and take the profits on a debit spreads also has to assume that one would get out with a limited loss on a credit spread and make an adjustment to bring in credit to cover the cost. In my two adjustments I either took a much smaller loss or still made money. If the market was really moving against me I would get out of the way and make money the other side or take a futueres position to hedge. I must simply take measures to limit my losses and get out. I am not afraid of losses, just big ones so I want to limit those as best as I can. I cannot do anything about a 9/11 event so I do not lose sleep over it.
As I always said, the strategy you choose is not as meaningful as the way you manage your risk and portfolio. I manage my risk and portfolio much better with credits than I could with debits on the SPX. I am not 100% right or have 40 months of consecutive profits, but I a make money consistently and that is my goal. I got to use the strategies that fit me as best as I can and I would never tell anyone to blindly go against their own trading style.
So what is the bottom line? Trade the strategy or approach that best fits your personal trade and risk management style and thoroughly research the risk and reward profiles of that strategy and of the underlying you are trading it on. Risk money that you can and not 100% of it. Losses are inevitable so the goal is not to ever have one, but to make them as small as possible under the conditions and keep your capital. Trade with a long-term perspective no matter how short the time frame of your trades. Although I day and month trade, I focus on annual results.
And most importantly, never let more than 5 pages go by without a JA pic...