There are always exceptions, but as a general rule, Taurus do not mesh well romantically with the following signs...
Scorpio is your opposite sign, and while you may be attracted to them at first, you will find that their sexiness only goes so deep. Unlike your genuine, substantial sensuality, inside and out, Scorpios' allure tends to have a short expiration date.
Gemini is too fickle and impatient for you to put up with for long. While they might make a good, fun, challenging friend, a Twin is just too much, and not in the rich, quality way you like. They like a wham-bam approach, you like slow and sensual.
Libra might get bored with your laid-back, private persona. They want to see and be seen, and think that a quality relationship involves lots of parties and social events together, while you think love is best expressed in a low-key, intimate way.