First the EULA: I'm fine with agreeing to these terms for gamesas, that's okay, and makes sure I can't make money of their work (e.g. when I try to sell my mod, they have the right to give it a way for free.) But Steam? Steam is the DRM provider and the host of mod uploading site. I won't give Macrovision these rights, neither would I grant them to the Nexus.
Second: Steam workshop attracts a kind of users that are too much trouble for me to look after. Yes, that may be arrogant and elitist, but frankly, knowing how to use the Windows explorer is a basic prerequisite for modding (yes, by installing various mods, mod-users are actually modding their game) If you can't figure out how to download and install a mod on the Nexus, you shouldn't be modifying your game at all.
Third: Paranoia. I don't like social networks, I don't like the idea of cross-linked internet services, I don't like tailor-cut advertising, I don't like Steam being able to keep track of what games I play when and how long and which options I chose, I don't like Steam linking the information of when and how I play what games with the mods I make.
This. Bethesda can have all the rights to my work that they want (Hyperbole, don't get carried away with that one), but I dont want anyone else near my stuff. BGS made the game I'm modding, and they made my modding possible, but other people weren't involved, and they can stay that way.
I also agree that if you cannot install a mod with the raw files, you should not mod. Or at least, don't flip out an get mad at mod authors when you break your game. Also, don't get mad if an author doesnt show up to help you get their mod functioning. While mod authors should obviously try their best to help everyone, some of us just cant. My latest New Vegas mod gets on average 100 downloads a day. If even 10% of those people ask for help, I can't be out there helping 10 specific people every single day. Not to mention that that's barely any. Some mods get 10's of thousands of downloads a day. So if the author gets a bit overwhelmed, dont blame them. We're here to provide you guys with content and have fun.
Again, yup. Though I don't have it to your extent, I'm cautious about how much I let companies pry.
I may or may not upload my current project to the workshop. I wont be done for 6 months, so I'll have to see it's current status at that point, but I may very well not. It depends.