>>21144068From the design standpoint Mega Frisbee is easily my top favourite. I love goofy looking mon that, despite their apperance, can also kick serious ass in competitive. I'm also happy GF didn't go too overboard with the details (hello Mega Sharpedo).
I'm however the most excited about using Mega Lopunny and Mega Sableye. I love Pokemon that offer great support options in addition to being offensively competent. M-Salamence, while great on paper, will probably be focused mainly on abusing it's own raw power.
Hoping for Megas for Flygon, Milotic and the Johto starters (preferably not shoehorned into the story but given to you after you complete the Hoenn dex).