More of my Pokemon have been male, overall. But..
If it's a feminine Pokemon or masculine Pokemon, I like to get their respective gender.
Barring Pokemon like Lilligant and Tauros, which are gender-specific,
I find the following Pokemon to be:
Feminine: Gardevoir, Lopunny, Milotic, Bellossom, Roserade, Mismagius, Banette, Ninetales, Espeon, Glaceon, Delcatty, Altaria, Gothitelle, Liepard, Purugly, Gorebyss, Wigglytuff, and Clefable.
Masculine: Arcanine, Bisharp, Honchkrow, Machamp, Conkeldurr, Lucario, Hydreigon, Scizor, Jolteon, Alakazam, and most of the starters/humanshape Pokemon.
Though I've definitely trained Pokemon against this; for example, a female Arcanine.