the HDD is great for your usual music, movies, editing and stuff. yea i rather get HDD
but then with SSD you can do literally anything to your macbook. toss it down the mountain, run 20 miles carrying it going up and down up and down. shake it like its a piggy bank. whatever!!! and the data in it will still be intact and unharmed
HDD is a disc, whereas SSD is solid state meaning its on flash memory so yea. its up to preferance
the SSD will give you a better ratio in keeping your data from shocks and stuff but its not fast and doesnt have space
but in the end i rather get HDD, i'll put a SSD in a MBA though