For you, with your (at this stage) limited knowledge it may be but for your instructor it is not. When we learn to fly we do not yet know enough to realise how much we do not yet know - that is why we pay the instructor. ASk any instructor regardless of what they fly and they'll tell you the C152 is as good as any - unless, perhaps, they do not have any at their school but you will not hear many experienced instructors knocking it that's for sure.
Also, C152's are not characterless! That is the voice of inexperience if ever I heard it.
VFE.