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Is the game open or instanced world? Like in guild wars, have to be grouped with other players to actually see them outside of cities.
Does CoH have RP or RP-PVP servers?
Does the game have a decent player base? Or is trade and the other channels basically dead 24/7?
Comments
It's heavily, although not exclusively instanced.
The unofficial CoH RP server is Virtue. It flucutates with Freedom for the top server population. Freedom is the unofficial PvP server now -- the pvp'ers used to use the test server (copying their toons over from respective servers), but duing dec 2009-jan 2010 there were free server transfers and so they migrated from all over to Freedom since it is, again, one of the top 2 populated servers.
The game has a thriving playerbase. There really isn't a a trade channel, the consignment house is used, except for the multi-billion inf enhancements, which people then just advertise on the ofrums or in broadcast, typically.
Give the game a go -- there is a free trial that will let you access the game up to level 14. There are some restrictions on the trial account, but it will give you a good feel for the game and the community.