It is more natural to say it is a "coastal city" or "coastal town". Any of the 3 expressions are okay; I would probably say "we are flying to ____" or "we flew to ____ "

I don't think there is a word for "Love of/for learning" however the following may be used for someone who is educated or is a dedicated student or intellectual: Studious Well read Erudite

She dreams OF being a researcher

Your sentence makes sense however it would be more natural to say: "Put your shorts on if you want to keep cool in the summer". :)

"I would say" - Would be used before you provide your opinion on a subject. "I have to say" - Would be used if you were going to compliment some one or if you were to comment on something that surprised you. For example "I have to say, I didn't think you could do it, but you did!" "I should say" would normally be used to place emphasis on your agreement with something. For example. Speaker A: "Do you think he is right to comment on that?" Speaker B: "I should say so, he is right about everything"