You tell me these are amateurs? Lol
Those are superb, it's really hard to pick a favorite, i mean besides the abstracts and the kitchy which aren't really my thing, almost all the others are great pieces
The portraits seem coming from a museum, they are excellent like old times, the big faces are also very nice to see and beautiful
I also like the winter landscape and the city which you like, but also the bottom flowers

And even if there's the tutorial for this one, it's still very nice to see