Just quickly went through your plan to watch list:
- Ookami Kodomo Ame to Yuki : now it's by the team that made summer wars and it seems you didn't like it very much,the good news is it's a very different movie and I know plenty of people who didn't really like Summer Wars who enjoyed Ookami Kodomo.
It has plenty of fun moments but can be quite dramatic as well.
- Tari Tari: A high school SoL/Drama that it overall quite lighthearted but every character gets an arc where they have to overcome personal issues.
- Hanasaku Iroha: Now this one definitely goes for a mix of comedy and drama, how much you enjoy will depend on how much you think it mixes both, that seems to vary a lot depending on who you ask