Wowza.. I'm surprised you actually finish anything if you're playing that many games simultaneously. I prefer to focus on one game until I'm finished especially when it comes to RPGs. For me, hopping back and forth between games makes it harder to be immersed in them.
There's also the chance that if I take too long a break from one game, I can't get back into playing it from where I left off, and then I end up abandoning the playthrough.
Well I should clarify that at the moment all the games I listed I have played. The first time or two I play a game I focus on it completely (to do so twice in a row though it has to be a damn amazing game - only FO4 and Skyrim, for current games, ever let me do that but they are also so open ended its easier).
Once PK was patched up I played almost the full 140 steam hours steady over the weeks (I get about maybe 10-20 hours a week to play depending on days off and the like). I didn't play anything else although I screwed around a little in FO4.
Skyrim I have over 3K hours in and FO4 almost 2400 now. Played them enough that now they are like reading a favorite old book or watching a favorite old movie. They are comfort games. I also still write stories. My avatar here is my main character in Skyrim who I have played almost since the game came out. Don't play as much now as I retired him but I still do some stories with him and just started a new set of stories last week.
FNV I played for hundreds of hours when it came out. I recently modded it, got all the DLC, and a nice ENB preset … and slowly working through it. But while I love the game I love FO4 more and that scratches my FO itch. So I only play FNV in little bursts.
POE I played twice through in a row and POE2 once - but started another then decided to wait till all DLC was out. Now I am debating a new character but probably won't start till I finish my second PK play through.
So all games I have already played. After finishing PK I am not ready to immediately play it all again so I more or less am testing new characters and not playing dedicated.
Sorry I am rambling. TL;DR is that first time I play a game totally focused - unless I can't get into it but in that case I will never finish. Once played through if I like it enough I will play again but usually not with the same focus.
EDIT: And I have abandonded many a second or more play through for leaving it and coming back after too long and not feeling any connection to the character or lost where I was. Then I delete and try to decide if that means I am done with the game or whether worth trying again. Usually if I stay away too long it means my heart really isn't into another play through.