Is there any particular format/style/etc. that you've just never gotten into?
As I've said several times before, I generally can't get into dating/relationship shows, and I'm not really sure why. That said, I did find Bzzz! far more palatable than most, and Love Connection has produced some decent stories. (It also had Chuck Woolery.)
I also don't like games that are entirely luck-based. I burned out on Deal or No Deal well before it devolved into an endless string of cartoonish contestants, general gimmickry, and product placement. (Though I would love to win a lifetime supply of Sprecher root beer.) On that same line, I've never liked lottery game shows for the same reason — and it doesn't help that a lot of the ones I've seen have abysmal production values.
Finally, another one that I've stated before — I can't stand any show in the Chuck Barris library. I just find the 70's cheese so overwhelming on them. (It doesn't help that two of Barris' three flagship shows fall into the aforementioned "dating/relationship" category.) Furthermore, nearly every TNG and TDG I've ever seen had multiple instances of answers so off-the-mark st00pid that I wondered how they managed to successfully operate the door leading into the studio. ("What's your husband's favorite condiment?" "Pool table.")