Oh boy, I've got a lot of those characters:
I was so hyped for this character. I'm a huge Pokemon fan, and Greninja is one of my favorite gen 6 Pokemon as well as one of my favorite starters. When I heard that he was going to be playable in Smash, I was reeeally happy. I did not expect him to be playable at all. When the 3DS version launched, he was the very first character I used. I mained him for a long while. After a month or two though, Shulk got in the way and I eventually dropped Greninja. I started playing him the other day, and boy he does
not feel as smooth as he used to. The way he hits things... I can't describe it; it feels like I have to try really hard to get all the combos I want, and it's just frustrating. It may be because I've gotten better and realized that this character wasn't for me, but Greninja just doesn't feel the same. Maybe the nerfs really did affect him after all. To be fair, I never got into the Greninja meta, so I never found out how much Greninja's nerfs had affected him.
Another character I got hyped over. I'm also a big FE fan. Awakening isn't my favorite but whatever; the more FE the better. Anyway, like Greninja, I used him for a while. I eventually dropped him though, because after playing with him online, I realized that I actually wasn't good with Robin. As a character, he's a little too precise for my liking. I'm not a huge fan of characters that leave so little room for error.
Also one of my most hyped Smash 4 characters. For a while she has been one of my favorite FE characters. I don't like her nearly as much anymore (considering
EVERYONE likes her now), but she's still cool. I dropped her because again; she's a character that just didn't feel right for me. As I played more characters, I slowly stopped using her. I guess it's because I expected her to be a unique character. Instead, she's just a Marth clone, and not really an interesting Marth clone either. I'd rather play Marth now, because his tipping mechanic is so fun, even though it's not as strong as it was in Brawl and Melee. Keep in mind that I don't mind clones. I just feel that unlike Dark Pit, Lucina feels very underwhelming to me as a character.
Favorite Mario character, so when I heard he got in Smash, I got really happy. I didn't play as him though; I played as all of the other Koopalings. I was so shocked that the other Koopalings were in the game, that I eventually stopped paying attention to Bowser Jr. Like all of the other characters, I just stopped using him because I just wasn't feeling him anymore. Plus, I'm not a huge fan of the Koopa Klown Bowser Jr. I expected Bowser Jr. to focus more on his paintbrush than anything. Like Lucina, he's just too underwhelming for me to play. :/
He's been my main for the longest. Out of all the characters I've used, he has the highest play time, records and everything, more so than my current main Roy. Dropped Greninja for him. I was in love with his crazy play style and long range. Plus, he was a new character for me; I was interested in getting to know about his character. I dropped him around June though, because Roy came along; I felt like Roy was much better to play because unlike Shulk, I could make an error and still get away with it mostly. Shulk is like Robin in the sense that you have to be really careful when using him; make one mistake, and you'll be punished heavily. I still use Shulk every now and then, but I'm very rusty now and I don't really feel like using him much anymore. I understand that Roy
probably isn't much better than Shulk, but Roy for me just personally feels much better to play. I really wish Shulk had gotten landing lag buffs; he'd be incredible.
and
Last but not least. Long story short: I thought I was good with these guys, but after getting beaten really badly online and by my friends, I realized these characters probably weren't for me. However, I think that I may pick them up again some day; they're really fun, even though Mega Man in particular looks kind of difficult to master. :U