I Have No Direction. Need To Choose Between Internships

I'm a Finance major senior. Did an Audit internship last semester; it was dildos. I have no idea what area of Finance I want to go into. I trade for myself and that's fun. Real estate is cool and sexy. I've been considering just saving up money and buying small businesses. Or traveling around South America and seeing what happens.

Basically, I'm just going with the flow. I'm not worried. I've always had this sense of manifest destiny and I'm sure shit will work out. I enlisted in the USMC recently, so I'm just doing a semester of school and an internship while I wait for boot camp.

But anyway,
I landed a Real Estate Development internship with a very reputable company. The people are all great. It's close to school. Office is nice. They have foosball and good sandwiches. Whatever. I'm sure it'll be a fun time. Also, the MD is involved in prop trading and I was hoping to weasel my way into a trading internship afterward perhaps.

I also have an internship with Northern Trust Asset Management on the table. Which could potentially be a great opportunity. I know for sure I'm interested in trading and AM is more relevant. But I could end up loving RE.

Advice?