hey, my personal take on this is that: opposite attracts. i
personally feel that ppl who are too similar in characteristics n
personality (not hobbies n interest ar..) might find it difficult
to be with each other in the long run. unless, of course, if one
half changes his/her characteristics to accomodate to the
other.
if u have 2 super-confident person together, n when they quarrel,
both of them won't admit defeat.. if both are the shy shy type,
nothing 2 say everytime, the relationship might get boring after a
while..
why do i feel this way? coz me n my bf r quite different in a
certain manner. but somehow, our characteristics compliment each
others' 
in short, i'm trying 2 say: just be who you are. your girlfriend
most probably already loves you for who you are, why bother to
change your nature? btw what's the horoscope signs of the 2 of u?
juz curious..