For the people that say Mass Effect 3 has very little RPG elements, let's break it down:
1) Most importantly we take the role of Shepard, the go ahead human that wants to unite an entire galaxy against all odds.
2) Secondly and to no lack in importance we have a narrative crafted around the player's decisions based on a moral/reputation system.
3) Third, being that this is in fact an RPG, the player is given multiple optional side quests to tackle whenever or if they see fit related to the lore of said game.
4) Forth, tied directly to choice each game imports the player's previous decisions and transforms the world in the current title based on said decisions.
5) Fifth, tied to weapons, which all have different stats and weight ratios that can be viewed within the UI, mods alter said weapons for specific attributes.
6) Sixth, the player can allocate a set of points into an abilities skill tree letting them unlock or even upgrade certain abilities (even having the option of 2 possibilities higher up said skill tree).
7) Seventh, the skill tree is directly related to the level of the character, a system that boosts the player's stats for health and shields depending on their level.
8) And finally exploration is a big factor in any RPG and esp Mass Effect, the player uses the Normandy to discover new locales or to travel to known regions of space.
9) Oh forgot combat, the tactical gameplay that usually consists of the main character and a set of allies in his/her party that directly correlates to the counter of enemy strengths.
Ah Yes, "Mass Effect 3 has very little RPG elements". We have dismissed that claim.