IMO it really depends on the player that's shoving. If he's tight, I wouldn't call with anything less than 10-10+, AQs+ or AKo. If he's on the loose side, add high broadway cards, A-10o +, A9s+ and any pair higher than 7. But it isn't at all a mandatory call. With 35 BB you can still find plenty of opportunities to steal and plenty of hands to see a flop with and actually play poker.