Finn the Jakey wrote...
Kelly and Diana Allers are barely romances at all, so I don't count them, and Samantha doesn't show up until the third game.
Barquiel wrote...
I know that pic, and it's nonsense imo.
I think quality is more valuable than quantity. Garrus and Kaidan do have two of the better romances (content-wise) in ME3. Straight ManShep/lesbian FemShep may have more quantity, but the majority of those don't have quality backing them up.
Except that's just your opinion.
If you want to play as a straight Femshep but you killed/dont like Kaidan and don't want to romance a dinosaur, you're screwed.
I think 2 romances/gender are enough.
Both Dragon Age games and BG2 had 4 love interests
Kotor had Bastila and Carth
Jade Empire had romance content for Dawn Star, Silk Fox, and Sky
There were too many romances in the ME trilogy and due to the sheer number most of them were rather shallow. Had Bioware focused on just a few each one would have been special.
As for Jack and Miranda...yes, that's my opinion, I would have been disappointed if they were my love interests in ME3. But it's pretty clear Bioware couldn't handle 13 romance arcs...