As much as I love 2PM and want to see them in concert, I'd rather meet Taecyeon for coffee. Actually, I don't drink coffee, so I'd meet him for ice cream instead.
I think it would be a lot of fun to talk to Taecyeon one on one. He does speak English, so there is no language barrier. He has such a fun and goofy personality that I think I'd get along great with him. Plus he's very smart, so I could hold an intelligent conversation with him also.