LMAO well it ain't that dire but here we go.
A Snowball is something you do when the quality of the audio isn't terribly important as long as it's passable, speech is coherent and instruments at least sound like themselves. It's an improvement over a webcam microphone but that's it. You use it when your channel is just casual vlogs and it's okay that it doesn't sound terribly professional. It's something you'd record an instrument with if the video is just a little "Hey I did a cover of this song check it out" and the sound quality isn't too important.
That's what the Snowball is. A casual microphone. It's cheap, you can get it easily, you don't need a USB interface. It "gets the job done". Look at what the OP was asking about: the AKG C214 and Avatone CV-12. These are PROFESSIONAL microphones for professional applications in the $400+ range, not a $60 desktop mic. The OP clearly knows microphones and was asking about some mid/high quality hardware. You don't suggest a Snowball in this situation whatsoever.
Like I said in the other thread, people tend to suggest the Snowball because it's probably the only microphone they've ever had that wasn't attached to a webcam or a gaming headset, it's an improvement over that, so they go and suggest it to others without having any experience beyond that or even understanding what other people are looking for in a microphone. Someone asking about the C214 and getting suggested the Snowball is like someone for a good gaming PC and you suggest a Chromebook. Sure, technically it can do what you're asking but it's not gonna do a very good job of it.
Now, to the OP, when you talk about warm and emotional microphones, my FIRST thought is the Blue Baby Bottle. The AKG C214 had a "sharp" sound I wasn't a huge fan of on my voice and I'm thinking with a stringed instrument that'll only be more pronounced, the Blue gives it a nice lush, almost tube-oriented sound. AFAIK Bob Dylan used the Baby Bottle for all of his recordings. I have no experience with the Avatone so I can't say much there. I currently have a Neat King Bee which, to my ears anyway, is like the Blue except with some extra clarity. I've actually seen reviews of their Worker Bee ($200!) that suggest it's even BETTER for certain applications.
Good comparison:
I admit I can't speak a TON about instrument recordings, but going by my impressions of the various mics I've used for vocals I can at least give some nudging. Hopefully that helped![DOUBLEPOST=1440181184,1440180863][/DOUBLEPOST]
The question is this: how serious are you about recording? Like
@Tarmack said, a cheaper Shure with a Scarlett 2i2 could do you just fine. In that case, I really would say to give to Worker Bee a try. That'll be a total outlay of about $300 (not sure what that is in Euros haha) and would probably have you set for life.