If you enjoy research on a microlevel in terms of the science of how very small changes within the brain make changes on a bigger level (phew) then neuroscience is your thing. It's fascinating, but it will limit you to neurotransmitters, action potentials, endocrine function etc. The reason I found I actually love Psychology is that I get to switch between these things and others (e.g. Social Psychology, Personality Psychology, Clinical Psychology). When I get bored of one aspect I fall into another.
The other thing with Neuroscience, and also what other people have said, is that it will slot you into a very particular area of the job market. In particular, research, which as a few of my PhD neuroscience friends attest, can become extremely boring after a while if your heart is not completely in it (and sometimes even when it is).