I had been using acrylics for years on lead figures and took a while to get used to their behaviour when Icame back to kits. Surface preparation and priming seem to be key. Getting rid of the mould release agent and having a good primer for the paint to go on. The Humbrol primer works fine if thinned with the acrylic thinner but can form droplets and retreat from areas when thinned with water. I also use Tamiya white primer spray and am trying out the Ammo Mig one-shot white. All I can suggest is try out various types and see what works for you.
Where acrylics often fall down with brush painting is opacity - with whites, yellows and red shades being particular offenders. I also run into difficulty with gloss and satin finishes when brush painting - brush marks, uneven finishes and all. With the Humbrol satins I had a lot of trouble with the pigment and carrier medium separating during drying leaving dark streaks - probably needed thinner coats than I applied for very rapid drying. For large areas of uniform colour (especially white) I have used the Humbrol acrylic spray cans without trouble - including gloss shades which I struggle with when brushing.
I tend to use a selection of Humbrol matt (easy to get at your local Hobbycraft), Vallejo and Ammo Mig acrylics (shows or online only), with a few Tamiya (also at Hobbycraft) thrown in, though these vary between shades as to how well I manage to apply them.
Acrylic varnishes are another issue - gloss tends to be OK but Satin and matt can leave a white residue. I have just started using the Ammo Mig acrylic varnishes, although mixed for airbrushing they work brilliantly with brush as well. I have also had no problem with Vallejo varnishes.
In short no 2 people will have exactly the same experience so trial and error is the way to go,.