I would consider myself a meso-endomorph. I can put on muscle easy when I train and diet correctly, and I can do the same when I want to get lean. I do have a bit of trouble getting abs though. I've had them before but in order to keep them I have to stay strict on my diet. If I looked at myself before any training or real dieting I was probably closer to a mesomorph as I was bigger then most kids my age and didn't hold much fat. I didn't have abs but I wasn't fat. The only time I have ever been fat is after turning 21 and drinking daily while consuming 2 or $2 whoppers....but damn it taste great!
Yes, but this is a bodybuilding site. You'd think that mesomorphs would be more inclined to take up bodybuilding. Besides, I doubt that all (if any) are pure mesomorphs. I'm a endo-mesomorph (with more meso than endo) so I put down mesomorph. The poll really should have been:
I bet that most on IM would fall into the second or fourth categories.