With as strong as gas trucks are today, most people do not NEED a diesel (me included). A gas truck will pull most anything a diesel will pull, just not as easily or as well. I've had gas 2500s and have a diesel right now. I loved both of them, I got a diesel because I always wanted a diesel. Was it worth it, realistically, no it was not.
When I had a gas truck, there were few modifications out there to make power, most gas performance parts are a waste of money. I saved a lot of money because I left it relatively stock. Fast forward to a diesel. The aftermarket for diesel performance is bigger than cutting springs on your Honda civic it seems. Many people get bit by the bug and end up dumping a ton of money in their already expensive truck. Then something breaks. More $$$.
If you tow heavy on a regular basis, it's a no brainier.
In the end, you have to ask yourself why you Need/Want a diesel and evaluate it from there. I don't know if I could go back to driving a gas truck, if I did, it would probably be a Vortec MAX. (Modified of course).
2008 Silverado 2500HD LMM
BMF Novakanes on 305/55R20 Terra Grapplers
EFILive V2 DSP5 by IdahoRob
5" MBRP Turbo Back / MagnaFlow DownPipe
AirDog II DF-165
PCV Reroute / ProFab EGR Delete
TransGo Jr. / Allison Deep Pan / Mag Hytec Diff Cover