S3: It was originally going to be the series finale
S1: Felt like a good series finale
S4: Feeling of closure
S2: No loose ends
S5: Wouldn't be a good series finale
S6: Left lots of loose ends
Yes! There are so many good MLP fangames. Some of my favourites are Story of the Blanks and Horse Game. I find out about a lot of them on Equestria Gaming, which has recently come back online.
I started watching it because it looked awesome and I loved the characters. I watched a video about the show and the fandom and it really appealed to me.