I like exactly one Ryobi grinder, their 4½" angle grinder model G-1155C. Mine has worked flawlessly since 1984 although it has needed some parts. It comes with everything you need i.e. grinding setup and also sanding kit, has a 5/8-11 spindle, and features a switch you do NOT have to hold on.
I also like the Milwaukee, don't remember the model number (4093?) even though it has a paddle switch. It's built a little heavier.
I also use two older Makita angle grinders despite their weird-ass spindles. My buddy gave me two, one with a grinding wheel on it, and the other with a wire brush on it, and I just use those as is. I own quite a bit of 5/8-11 stuff and I'm not about to replicate it all. But they are small and work fine.
I also own two big angle grinders. One I believe is a 7" Skil, which Gunner gave me fairly recently. It's very strong and runs smooth and cool. The other has no name but is built like a tank, about the same size as a Skil, but in much better condition. I got it real cheap because some idiot had taken it apart and put it together wrong, so the spindle ran backwards. I fixed it, lubed it, and now I use it a lot.
All angle grinders need to be torn down every few months and lubed. You can tell when they need it by the sound. If the cavity starts out clean and you use good grease, it will just sling the grease to the outside, and you can just grab it and smear it back on the gears again. Tough screws are best handled with the hit-with-hammer type of impact wrench. I got a good US made one of those once and boy has it paid for itself.
All together my grinders make a giant tangle of cords. I store them very simply
- I stood a 3' piece of 14" pipe on end, drop in the cord, and hang the spindle over the edge. All the cords stay neatly inside, and all the grinders lift out easily. A 20 gallon drum would work fine too.
Yes to eye protection, but also angle grinders are LOUD so also wear ear protection. I buy the soft foam ear plugs, not those hard yellow ones. The soft ones are comfortable to wear with safety glasses or a face shield. When I'm sanding aluminum, I use *both* safety glasses and a face shield. Stuff scares me.