Quad Question

Hi, everyone!

I've noticed that when I do lower body workouts, I no longer feel sore in my quads; only in my glutes, hamstrings, inner thighs, etc. In fact, I've noticed that I feel sore less frequently after workouts. I've been working out for more than 1.5 yrs, and I consider myself physically strong, so maybe my body's getting used to all the hard work...? Is this normal? Or am I doing something wrong?

I look forward to reading your responses :)