Hi, I love oats and use them a lot!!!
I use rolled oats from the feed store, I prefer rolling them in a roller mill rather than my hammermill. The hammermill makes straining difficult. Too many tiny bits that clog filters. I also use Angel yeast and prefer it since there's no gloop! I roll the oats just enough to break them open and not be broken too much, add warm water and pitch

Stir a few times a day for the first few days and then after 2 weeks it's time to run. Straining the oats this way is easy as pie. I siphon off the clear stuff and the rest goes into a mesh bag and then my mop bucket to press it. A batch takes me about 45 to squeeze, pretty easy.
The smell and taste to me is an oatmeal creme pie. The creamyness, the oats, a good bit of sweetness, and the smooth mouth feel. A bit of spice too. I'm not a fan of white whiskey, but I really like this white. I haven't barreled a 100% oat whiskey, but oats are a good % of most of my whiskies the past years that were barreled and I'm glad I used them!
I'm currently making and stripping an 85%corn 15% oat bourbon recipe all summer to fill a big barrel as a whiskey solera base. All the whiskey in it in the future will have oats in the mashbill. Maybe a 100% oats will become a small part of it one day!