After that was over, things went pretty much back to normal. There's now a low-level fear all the time of losing all the money (something PG's written about recently) and I'm constantly worried I've invested it badly. I didn't make any dramatic life changes so people don't really treat me differently.
The biggest thing is that it provides a sort of mental backup -- when I'm feeling bad about myself or about to do something risky, I can tell myself not to worry.
My sense is that it bears out what the happiness research says: dispositional factors are much more important than situational ones. PG was an abnormally happy person before he got rich and he's still abnormally happy. I was pretty miserable before and I'm still miserable. (The reasons are more complicated but the result is I prefer my misery.)