I remember the scene where he sacrifices himself to save Shepard. The moment the piano started I was tearing up badly, then he goes over the edge with the Rachni. I was so sad till he staggered out of the cave alive asking for something to eat. If I could i would have given him a Vegas style buffet.
These kind of scenes are usually cliche but when seeing Grunt struggling against the Reaper Rachni with the piano music playing got me worried and when Grunt fell, I shouted "No!" and thought a great character but when he emerged bloodied, I was SO relieved and gained his support to fight the Reapers.