One of the things every astronomer will tell you is that Sol is an average star. Average size, average age, average everything. However, after 6.0 patch, Sol is pretty much the single biggest star system in the game. It is very hard if not impossible, to create a system with more objects. You may create a system with, say, more planets or more moons, but a system with more planets, moons and asteroids at once? I don't think I have seen one yet.
Which is why I think the system generation algorithm needs to be updated so that very large systems, sometimes with 20 or more planets, are generated in some numbers.
Sol is actually very, very large for a star. It's in the 90+ percentile among known stars by mass. (Sorry, can't find the actual statistic.)
Averages can be deceiving. The sun is "average" because there are a very small number of real whoppers out there and they skew the average upward. But the vast majority of stars are smaller than our sun.