For me it is difficult to point out one or two episodes i think i can put it this way...
Aryan's best...
...silence...first few episodes.
...smile...the episode where Shaina gives her interview.
...romance...ofcourse the scarf episode.
...concern for his friends...Boxer's ,Ajay's,Ved's and priya's episode.
...pain...his family's death.
...depressing ,helpless moments...Shaina's exit,beeing framed by ved&Raja.
...naughty moments...scenes with Deepika.
...anger,passion ...bomber episodes
...moments of failure....the last episode...