To be fair getting 120 stars in this game is pretty easy but I've started 'round two' and can already see that it's a bit crap.  I can imagine people doing it with a game guide but I've never done that in my life.  Maybe I'd try it every week or so, but not for long.

Already finished that a week ago. The very last galaxy is no cakewalk (unlike the one from the first game).  
I found the green stars to be a better "second quest" than just doing the exact same stars again as Luigi. There's no real progression in difficulty with them, as its kinda all over the place (the green stars in a galaxy are the same amount as the regular power stars). Plus its not that hard to find where the stars are (there's that tinkling sound they make, so you can listen to where they are). Trying to get them is the real challenge.
 
On the OCD side of things, it's worth it to see every galaxy completed with a gold crown.

I am not even that far in the game!

" I am not even that far in the game! "

Question: Is 'Luigi's purple coins' style level back? 
 
If not, then sure. If yes, then Fuck No, the last time drove me mad.

There are purple coin levels but they're just prankster comets in the main campaign and they're pretty easy.  Easier than the one Chimp Challenge jumping on octos.

" @Willy105 said:

" I am not even that far in the game! "

Just vote when You've got an idea of what you'll do.  I played it every day until I got the 120 but then started the green stars and it's just not as compelling for me, maybe because I've got a big pile of games to get on with.  I felt like there's a longer time between when you can do a shakey-spin attacks than the first game but don't know if that's crap as I leant out my first game and haven't had it back.  (Haven't even get 120 in the first one and really want to get it back now.) "

" There are purple coin levels but they're just prankster comets in the main campaign and they're pretty easy.  Easier than the one Chimp Challenge jumping on octos. "

I already did.  I'm never doing that again.

I did not get all Luigi stars in SMG1, but we'll see about this one.

That Chimp Challenge was pretty easy, unless you mean a different one from the one I played. "

I love Mario but man, I've never wanted to 100% any of the 3D Mario games, that's just too much Mario for me.

i have 241, its pretty easy. i just need to get about 3,000 star bits to get the very last star...