Rose hairs are one of the hobby classic firsts - among the Mexican Red Knee (Brachypelma smithi) and the Pink Zebra Beauty tarantula (Eupalestres campenstratus). The three are reknowned for ease of care and tend to be docile as well.

That isn't to say that you may not happen upon a very defensive or skittish individual - no two animals are alike, but in general you have a good chance of getting one with a good temperament if you go for one of those guys, if that's what you're looking for in a pet tarantula.

Personally, my rose is one of the rare "aggressive" or actively defensive ones - if I touch her back legs or abdomen with a paint brush, she'll turn around to face the disturbance in a threat posture, stamping her front feet but if you want one that is docile enough to handle, you can either see if the pet shop will let you bring back the tarantula in - say the first week - if it turns out not to be docile, or look for ones that have been owned previously and the owner should be able to tell you or show you their temperament.