I've been watching some of the cardrunner videos and they are of the opinion that you should always be raising and never limping. The videos are all 6-max and this makes a lot of sense for 6-max because there is only 1 position beyond the hijack. There is no middle position really. In full ring, it seems to make some card play a bit more difficult from the early and middle positions.
For example, I play just about any pocket pair when the stack sizes offer set value. Raising the small pairs from early and middle just seems to be a disaster. When raised, the hand doesn't play well after the flop to callers with position if you don't make your set. Any advantage you get with pre-flop pot-building is lost to crafty players on the button floating your c-bets and taking medium sized pots away. Small suited As and some of the higher suited connectors also seem to suffer here.
So, in full ring what hands are you raising from UTG+1 to the hijack? Is the open-limp in your repetoire?