My favorite type is Normal, as I like ALL Normal types (I mean it, ALL. Even Farfetch'd is quite cute without his stupid piece of brocoil). I like Ghost/Psychic and Dark pokemon too, but not all of them.
To be exact:
GHOST DISLIKES: Sableye (does this ----- have any weakness???), Frosslass (moral: females are ghosts?!?), Spiritomb (why, why THAT name??), Drifloon and its evo' (WHAT DOES A HOT AIR BALLOON HAVE TO DO WITH GHOSTS????), Dusknoir (the Duskull family decide to go French, parsche?).
DARK DISLIKES: Sneasel and Weavile (behold, the era of identical evolutions), Poochyena and Mightyena (alternate Houndoom/Houndour), Honckrow (what have you done to Murkrow??), Sableye and Spritomb again.
PSYCHIC DISLIKES: Uxie/Azelf/Mesprit (ladies and gentlemen, the most ridiculous legendary trio EVER!!!), Gallade (metrosexual...), Natu (who beheaded Xatu?), Meditite and Medicham (shouldn't they censor these names?), Creseria (Darkrai needs no rival!), Bronzor and Bronzong (Baltoy and Claydol go blues, ohhh yeah...).
All the others are above average to me, so I can't say I totally hate these 3 types.