Ok i'll add my 2 cents worth as well.

3DGS's good points, Only a one time price unless you want a major upgrade.
"No royalties or indie to pay" Heaps of free resources, good tuts, models, plugins etc.
Great support from both community and producers of GS. The AUM becuase of it's snippets and workshops.
Consistant updates for free. "Unlike other programs you buy "developers that produce a program and after
a few months or years scrap it and don't tell you. Take icex and world studio for example."
You can virtually start making money from 3DGS in no time. "Low budget stuff or course".
Proberly a few more good points that I can't think of right now.

Bad points. The constant crashes errors and bugs.
As many people have said the editors need a major overhaul.

All in all I am happy with 3DGS I have learned quite a bit over the few years I've had it and I am only getting better.
It's like everything else you try , buy or use, they all have thier bad and good points.
You might switch over to unity or somethings else but I betcha there will be things about them you don't like as well.

Well that's my 2 cents worth,