Blues/rock key signature?

This is a "best practice" question. I've googled it and find a wide range of opinions but no real consensus.

I often transcribe rock and blues tunes. It's always a question whether to use the key signature of the tonal center, or the one that results in the fewest accidentals, or an open/no key signature. One that (to me) best/most unambiguously conveys a sense of the music, or one that's (maybe) easier to read.

Here's one example. It may not be the best one but it's the one I'm working on right now. It's a rock riff in E with a bit of a blues inflection. I tend to want to write it with a E major key signature, but I have to naturalize most or all Gs, Ds, and Cs. Or, I could write it with no key signature, which makes for few accidentals. Or, I could go a la modes and could use the key signature of D or A, which makes for fewer but still plenty of accidentals.

Up top is C or open key signature; bottom is as E major.

What do you prefer today?