有点儿

有点儿 goes before an adjective and usually adds a small complaint. 一点儿 goes after an adjective for comparison, or before a noun for a small amount. So 有点儿累 means you feel a bit tired. 今天一点儿累 is wrong because 一点儿 cannot sit before 累. If you want water, say 喝一点儿水, never 有点儿水. If you want faster, say 快一点儿, not 快有点儿.

有点儿 often signals a small problem, not a neutral amount. 有点儿贵 means it costs more than you want to pay. 有点儿累 means you feel tired and want a break. If you say 她有点儿漂亮, it can sound like she is pretty, but not that pretty. For real praise, say 她挺漂亮 or 她非常漂亮. 有点儿喜欢 can work when your feelings are mixed or not strong.

Textbooks sometimes call 有点儿太贵了 redundant because both words add degree. In daily Mandarin, it is common and sounds completely normal. It means the price is over your comfort line, but not shocking. If you want a clean textbook phrase, say 有点儿贵 or 太贵了. If you want to sound like a native, 有点儿太贵了 is fine in casual talk. “我的男友说：“那个桌子和椅子有点儿太贵了。”” (My boyfriend said, "That table and chairs are a bit too expensive.") ── [《吃的东西和喝的东西》](/read/buying-food-drinks#s17)