I agree when talking about paint - but take a look at the paper I linked to - it branded Satin/Semi Gloss.
Ugh. That's what happens when they don't use industry standards.

Either way, I've seen the semi gloss paper that Sheep uses, and I thought it looked great. I just stick with the matte that I've been using for the past year because I also like the way it looks and I have a good supplier for the paper. (Also, I bought 500 sheets worth of that paper, so I'm stocked up for the moment.

)