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So I've had a fair amount of experience playing MMORPGs and had quite a bit of experience with the travel systems. Some of them are down right terrible, while others seem to enhance your playing experience.
Best: UO - recall rune system. You could mark 'runes' almost any spot in the game and recall to it at any time (with the exception of dungeons year later). This system developed over time from having runes which you could lose when you die, to blessed runebooks which stayed with you. It allowed you to travel instantly to help friends and meet up with other groups of players for PvP fights and raids.
Pretty Cool: Shadowbane - It had a portal system which allowed certain classes to "summon" you to a certain location (with cooldowns), but a large portion of the travel was actually walking / running from point to point, through a lot of open PvP warzones.
Downright horrid: SWTOR / WoW - Rail to Rail on safe nodes. I remember 20 minute long griffin rides in WoW which you couldn't do a single thing except go AFK. One of the biggest reasons that I left the game as I really didn't appreciate the game "extending" your game artificially.
So which do you think are the best?