More games, less time. It's a simple mathematical change.
In terms of how I play the games, nothing has really shifted. I will still replay games I like, though perhaps not quite as much as I used to. The difference is that, whereas before playing a game for many hours at a time was fair deuce, now it takes up significant time in which I should have been doing something more productive. Basically, I now have far less room to be irresponsible with my work schedule, but I still am anyway.
As for the types of games I play, that has evolved a fair bit. I continue to enjoy the same kinds of games I did when I was younger, but nowadays, genres aren't nearly as partitioned as they once were, so I've gotten into a lot more games that I wouldn't have or didn't play earlier in my life. This has developed to the point where my favourite style of game is the self-titled action puzzle genre, which encapsulates many different games. Additionally, I'm more willing to experiment - I have never gotten much into RPGs (although the fact that Europe missed a lot of them probably had a part to play there), but recently, I've been able to expand my horizons and have come to enjoy certain RPGs.
Naturally though, the single biggest change is that I have more money to spend on games, so I now possess an intimidating backlog and continue to increase its size by snatching up deals left, right and centre. To some extent, this reflects certain changes in the video games industry; both factors play a role. This hasn't really changed my attitude on finishing games, as most of the time, I do feel an urge to complete what I started and, you know, get around to things eventually.