The bigger the map the better! When you have a ton of data points all mapped out Maltego has tools for you to analyze this data in amazing ways. You can sort of twist and turn the data to look at it in different ways to discover the meaning of it. Say you have a dataset of 1000 different hacks that have been attempted or conducted on your network. And you populated Maltego with tons of data. Source IP of the attacker, attack method used, port attacked on, country of origin of attack, time of day of attack, duration of attack etc etc. With Maltego you can identify patterns that you can't with other tools. Like you might see that 300 of the attacks all happened on port 337. So you can isolate just for that, then look for commonalities. Time of day? Tools used? Country of origin? In just seconds you can drill down to find some of these and start making a picture on who might be attacking you. I've used it and it's amazing for showing you graphs in ways you never thought to look which can help tremendously when doing research on certain things.