We obtain asymptotic formulae for the number of primes p x for which the reduction modulo p of the elliptic curvesatisfies certain "natural" properties, on average over integers a and b such that |a| A and |b| B, where A and B are small relative to x. More precisely, we investigate behavior with respect to the Sato-Tate conjecture, cyclicity, and divisibility of the number of points by a fixed integer m.