At our shop we used to say, "if it weren't for 99-05 VWs, we'd be out of business." That's an exaggeration, but not too far off. We saw them a lot. Our invoice software was really intuitive and let you search your profits by make. VW always topped our list. Since we were also a transmission shop, Dodge came in second.
Unless VW has finally released parts to the aftermarket, you'll find that they are frustrating. VW made some really E36 M3ty choices with parts. The vent hose from the oil canister was made from flex loom that wasn't split. Seriously. It was super flimsy plastic corrugated tubing that disintegrated at the thought of hydrocarbons. To add insult to stupidity, they made a very proprietary shrouded o-ring connector on each end that meant you couldn't just replace it with proper $3/ft hose, you had to buy the actual part, it was ONLY available from VW, they never kept them in stock, and they cost $181 wholesale.
For 12 cents worth of plastic.
VAG years also did some funky things with OBD. If you put in an aftermarket stereo and didn't use the right kit, it set a CEL. Then, unwitting techs plug in their code reader and discover that it is fried because the stereo installation now sends 12v to a pin in the ALDL that is only supposed to have 1.5v.
And don't get me started on things like timing belts. In a beetle, you have to remove a motor mount right in the middle. It is about 4" long and 3" wide and it has to fit between the engine and the strut tower which has about 7/8" clearance. Or, how about alternators and AC compressors where the shop manual says you have to remove the whole front fenders/bumper assembly.
AND WHAT THE berkeley IS THAT SMELL? We used to call them crayons. A tech would come in for his next job and I'd say "go do the timing belt on the yellow crayon."
Having said that, they were fun to drive. Ergonomics and space were pretty good, and I love the ALH TDI. Not too tough to modify. Stout rotating assemblies are good to about 300 lb-ft before they start bending connecting rods.
A lady I'm seeing has a '16 bettle. Light years ahead in the interior quality department. Time will tell if it's a good one. I will say that it has 23k on it and already had two recalls.