I too had a quiet time as I left the Mob after 24 years. However, I was quite partied-out by that time anyway.
When I left a civvy company, after 5 years, I was well impressed with the farewell festivities - And I was invited too!
When I left my last company I'd asked "Top Management" not to announce my leaving as the so-called "managers" would just take that as a cue to not do anything I needed done!
So, on the last day, I just passed over a note of the state of my now completed tasks and walked out shaking a few chosen hands and saying farewells on the way out. To the astonishment of many, may I add.
It can work well both ways.
Enjoy your new Life, and leave the old one behind. You won't forget it, but you'll get over it.
Rigga