All ya wanna do is talk-talk
Macandal:
I would suggest that, before even considering your personal preferences, you make sure that the agent who wants to represent you is LEGIT and COMPETENT. It doesn't matter how great you two get along if the agent is either 1) stringing you along to vaccuum out your wallet; 2) stringing you along because s/he can't sell a ms. to a publisher even if someone's life depended on it.
There's plenty of info on these forums about how to determine if an agent is legit and/or competent, so I won't bother to go into that.
Now, after you've determined via research that this interested agent can help you get your ms. published ... take the time to talk to the agent about his/her plans for getting your ms. published ... what s/he particularly liked about your ms. ... etc. You want to gather facts, yes, but also get an idea of the agent's personality and work-style.
When you ask about plans for getting a publisher, does the agent have detailed steps #1, #2, #3 all worked out for you already ... or does s/he provide more of vague,"step #1 and then we'll see" sort of answer. Which would you prefer?
Does s/he ask you questions, too? Ask you questions about your ambitions, what got you started writing, etc? Or is s/he "all business" -- focusing on schedules, etc? Again, which would you prefer?
You get the idea.