I clash with Scorpio's (in that I dont get them and they dont get me) and click with Cancerian's (my mum and BF).
I am a Taurus, so kind of typical there
taureans and scorpios are the perfect match according to everything i've read, they sit opposite on the 'wheel', which normally means they are your perfect match (another taurean here)
OP, i've never found a star sign that i 'always' clash with. i seem to attract a certain set of people around me with certain signs (and yes, most of my closest friends in my life have been scorpios
), but usually me clashing with someone comes from personality traits.