Wonder women being motivated by love is no different then other super heroes movies I've seen.
Example: superman 1 (Christopher reeves) was Motivated by his love for Louis lane, when she died in the earth quake he spun the earth backwards to reverse time to bring her back.
In superman 2 superman intentionally loses his powers just to spend his life as a normal person with Louis.
In spiderman EVERYTHING he did was because he loved MJ, especially spiderman 2 (Tobe McGuire)
In batman the dark Knight rises he loved that girl so much he did everything he could to hand over the responsibility to Harvey so he could stop being batman and just be with her, she literally wrote him letter saying how stupid that was for him to even consider doing that for her.
In avengers 2, Bruce banner and scarlet were secretly planning to run away together abandoning the team just to be together.
Wolverine only STAYED in the X-men to be next to Jean grey, he was almost willing to let phoenix destroy the world until he was forced to kill her.
So her motivation for love is no different then what we have seen.