As I have posted before, ask 6 modelers their opinions and you will get a dozen different answers.
Unlike Eagle, I like Vallejo paints. Their product line is diverse so you ususlly don't have to mix what you need. Yes, they are mostly made for military, figures, and fantasy so they are mostly flat. Sheen can be added with gloss media or a gloss top coat. Being acrylics I can move my painting indoors from the garage where the smelly enamels used to have to be painted
Vallejo makes four basic product lines plus some special effects & finish items. Model Color is brushable military and figure paint. Game Color is their brushable fantasy product. They are interchangeable. They are thicker but can be airbrushed with appropriate thinning.
Model Air is their airbrush ready military and figure paint. Game Air is the corresponding airbrushable fantasy paint. Again they are interchangeable. Air paints are generally too thin to successfully hand brush. If you find a good color in the Game line you can use it in a model/figure application. No one is keeping score.
All good stuff. I have also added Reaper Figures Core MSP paints to my palette. They behave just like Vallejo. Throw in some AK/Meng, Scale75, and Scale Colors to round out the paint rack. I have heard good things about Citadel fantasy figure paints but haven't tried them. Perhaps the Warhammer store in Fort Worth will survive the C19 lockdown
You have to learn how to use them. They dry to handle fairly quickly, but can be fragile. After allowing the paint to harden well for overnight/24 hours they can stand some rougher handling or masking