I just checked the stats for an apron I sold in the last 7 days. The buyer specifically said she was buying it to host a bridal shower. I have "hostess apron" in the tags and in the title. (I haven't had time to change any of my listings to include the new "attributes" due to preparing & filing taxes...)
BUT, according to the stats for this specific apron, NO ONE searched for hostess apron, or bridal shower, or gifts for her. Stats show that the apron WAS found by searching for Valentine's Day apron. (Which IS in my title and tags...)
I don't know what to tell you about using the generic tags like you mentioned. I have a few of those generic tags sprinkled throughout my listings, but I tend to try to use tags describing the item, and tags which also seem to be used to find my shop/item most often according to my stats.