I agree with everyone here, especially SkeeredChicken.
To give you an idea, here's what I did: I wanted chickens for eggs, but also needed something that isn't aggressive (I have little kids). So out of what was at my local feedstore, I picked Barred Rock and New Hampshire Pullets. I've read that RIR can be aggressive, but thought I'd give the pullets a try anyway (I've read on here about people having great success with them), so I only got a couple of those in my order. They are supposed to be great egg layers, and if that was all I cared about I guess I would have stuck with them. Since it's WAY more important TO ME that they be friendly and fairly calm, I tried to pick breeds to match. They'll be here in a few more weeks, so we'll see how I did then!
Also, I really wanted cold-hardy breeds. Thankfully, I read (and was told) that my choices would be able to tolerate our cold here very well.
I'd love to get an Old English, since I think the Roosters are BEAUTIFUL, but have read that they are flighty, don't like to be caged, and are more likely to be aggressive (I haven't owned them though, so am open to other opinions!). So, again, check out the breeds you are thinking about (some of the hatcheries online give GREAT personality descriptions. Also, Storey's Guide to Raising Chickens also helped me make my choices), and see how well they match what you are looking for.
Very likely you are getting different opinions because a.) Everyone has their own favorite! and b.) different people have their chickens for different reasons. Maybe you could ask those 'advice givers' what they loved so much about the specific breed they suggest?
hth! Good luck! The picking of breeds was so much fun!
-Meg