I've been swapping between yeti's and senjins as my 4-drop (other than keeper and spellbreaker).
Sometimes having 4 attack is nicer than 3. For example a yeti on board plus a swipe kills a Deathlord. Or a Yeti plus a hero power attack kills Loatheb.
But other times I need the taunt to block lethal, and so senjin is nicer.
It really comes down to the meta.
Vs control decks (priest, warrior, etc) I prefer Yeti
Vs rushy and burst decks (hunter, zoo, miracle rogue, shaman) I prefer senjin.
What do you guys prefer from these two??