I love S2 as much as S1.

First of all, situation between S1 and S2 is very diffrent: Seo Jin and Joon Ki breaks up, rest of friends (maybe) move out from Waikiki and old friends of Joon Ki from collage and high school move in. We don't get to know what's was wrong, why this is happening, but I, after some time, come back to watching S2. You CAN be disappointent, but giving a chance to S2 maybe be good idea, because:
• Relationship between Seo Jin and Joon Ki wasn't that awesome - Joon Ki at first wanted to give up because he saw Seo Jin as a kid, and at the latest episodes of S1 they were near break up, so, it's possible to they to have a break up after S1;
• The characters, even without cast from S1 is good - we get to know other people, who are in other profesions (not related to themselfes) and being good friends, every of them are diffrent, even diffrent from characters from S1, and I'm sure you'll love them;
• As in the S1, S2 has some of the Waikiki style - even if in front it looks like it's kind of scheme, you can love it, because of funny, crazy moments, not typical relationships and romances

I'm sure, even without reading all of my review, you can love this drama, after watching more than one episode.