Well, first of all, there's nothing wrong with not being the Bach of <insert activity you like>, what matters is that you have fun doing it. I, for example, am FAR from the best at anything i like, but it's still fun to do. The fact that i might get better is just a bonus. But, i know that nagging little voice all too well, it has tried to get me down before (and it has, though not to the degree of depression).
So, i'm with you! I (somehow) need to learn to speak more clearly, because what currently comes out of my mouth is a raging torrent of mud. Basically, fast talking coupled with muddled speech and a REALLY deep voice. It's probably just a matter of speaking more slowly, because my mouth can't keep up with my rate of thinking. And speaking just a bit louder. But y'know, when one has spoken in one particular manner ever since ones voice went from baby-soprano to sub-bass, it's a really hard habit to break.
And, as much as i hate to admit it, i'm a bit conscientious about my slim frame. My BMI says i'm normal weight, which probably isn't wrong either (75 kg at 190 cm, approximately), but i wouldn't mind being able to put on some moar beef. I'm not particularly weak, it's just that my arms look like twigs. Might just be my genetics doing that though, supposedly my mom's father was pretty slim too (he died before i was born), and it's obvious that my bro has my own pops' body type. Can't hurt to get in a better shape anyways, geology isn't an entirely sedimentary line of study. (NO REGRETS)