I used to like Liara before she became so untalkative and depressing in ME3.
I used to like TIM when he was not written by Artsy-hipster-cap-wearing Mac Walters. (He did not write him in 2, and you just know it. He's way too inarticulate to have written that dialogue)
I used to like Anderson when he was virtuous and clear and articulate instead of a "Man's Man" & "Hell, ****, mean SOB, you done fucked up **** ****" in ME3.
I used to like Udina when he had grey hair and spoke like a Monty Python character and was a sniveling scumbag in ME1 instead of a coldhearted coward who deserved to die for his actions and for dying his hair in ME3.
I used to like EDI when she was just that blue bubble with Helfer's calm and soothing voice instead of her orgasmic moany voice and her supposedly sexy robot-body and the writers decided to force the idea that she was as alive as an organic regardless of how much you renegade her down our throats.
I used to like Legion when he was all about hard sci-fi and made you understand what made Geth unique in ME2 unlike his ME3 counterpart where all his techy sci-fi exposition is deliberately vague and the reaper virus makes geth alive because some random orb we look at in the command center looks like it's breathing... or something. I liked him before he turned into pinnochio jesus.
I liked Samara when her code left you in awe and with a sense of respect for justicars before ME3 when her code dictates stupidity and contrived melodrama.
and lastly, I used to like Shepard before he became an automatic moron. At least I was the one giving the greenlights to make him say something stupid whether I actually had a choice in it or not in ME1 and ME2. In 3 he just insists on saying groan-worthy or ignorant statements all the ****** time.
I also liked the lead writer until he became Mac Walters.