I personally do NOT like big tits. There's a MILF next door that has a decent sized rack but not TOO big. The kinda tits I like would have to the size of Planet Katie & Kate's playground (No I don't have a thing for "Kate's"). Both of those girls have spectacular boobs.
As a big tit lover I hate to say this, but yes, they can be too big at time. Some of the freakishly big model like Melonie Charms, ect. are not for me. Anything else is just fine though
"Any more than a mouthful or handful is a waste" had some validity. Personally I like some size for the curves and looks but agree they can be too big.
IMHO natural tits are B-E-A-U-tiful and personally I can't get enough of 'um. Now, the medically enhanced, can crushing, vein popping monstrosities that look to weigh as much as my Marshall cabs...well, thats just too much.
The best natural breast out there belong to Ms. Danni Ashe.