Retired almost a year ago from IT - last ten years as MIS Director. Between Roth IRA and dumping as much as I could into CD's/Commodity Market/Precious Metals, I was able to retire despite being 'underage' and will be able to maintain my standard of living until my 401k matures.
Do I miss it? NO! I'm lucky I didn't develop ulcers from all the stress of the job, but it did pay quite well.
My circle of friends is from outside the company I worked for, so I don't even miss the people I worked with/bossed around.