may i ask where you plan to work after that?

Ok, so you're more interested on the field of work not that field of study. But wow your work back home is damn boring lol and I bet you will be hitting your face in the wall if you do that. FYI, Boeing/Lockheed, etc employs as many ME, EE and Software Engineers as they employ Aerospace Engineers. Essentially aerospace engineering is one engineering discipline that is a foot wide and a mile deep unlike ME which is the complete opposite. Let's say by the time you graduate, green tech is all the rage in the US. You can't move into that industry as an aerospace engineer as easily as a mechanical engineer. Even though the foundation and fundamental is all they need as you will be working on computers (like wtf you do with learning hard partial differential equations anyway, laplace equations?? duh) but ME stills holds sway. Since what you do now is is mostly general education requirements and maybe statics you can't really gauge whether your interest is real or not. Just make sure that the university you're entering has your 2nd engineering discipline of your choice so you can do an internal transfer easily without having to go through the trouble of changing school.