So, which ARE you. You shouldn't be ashamed to be ANY of these  - they all demonstrate fitness in various (but different) ways - well, the large guy as pictured here could probably usefully lose some weight... but their 'definition', within their present body type, is quite OK and should not inhibit anyone going to the gym to work out and improve. Remember that everyone there has their own agenda - they are not there to criticise you and if you are seen to be making an effort, they may provide good advice. Family fitness is also good... ...dad is clearly his sons in the right direction! So, take heart - whatever you look like now is not the point. What you could look like, with a little effort, is another matter altogether. Some inspiration for you now.