I always liked Super Mario RPG, but I just found PMTTYD to be pretty much the best game I've ever played. (except next to Mario Galaxy maybe) But on a closer margin, i'd say i still like Mario & Luigi better than SMRPG. the whole weird square-ness of SMRPG was unique and cool, but i just couldnt get enough of the good old fashioned nintendo fanservice implemented in M&L.