Questing works well for me because I can get friends and guildies to help me. Everyone says that the 6x abyss is pretty crowded, but I can't seem to find a party in there (I only see individuals, also soloing) and none of my active guildies are in the 6x range. It's more fun and easier for me if I do my quests instead.
Solo-abyssing is very cool though.