In today's world as technology is taking over lots of Realtor's activities (in a good way). Personally. I Don't go (or recommend) to go high volume agent(s), for them you are just a number. They show you 3-4 properties and accept you to purchase one. After 4-5, you see change in the behavior/attitude. Even though they "may" have knowledge but they don't have a time for clients to share it. They don't say much or if they do they just share info as you ask.
On the other hand, I prefer realtor with some experience who work with me and understand my "search". In case they don't have an answer, they get the answers for me. After understanding my requirement, they lay out the whole game plan what is best for me. Educate me along the way and help me grow.
Hence, i prefer part-time realtors. Who are really not too hungry for the money and yet devote their time to the client as it should be OR used to be. and I happen to know one :).