Well Jason, if I'd taken that staircase shot as my first portrait I'd have been bloomin' delighted... and with good reason.
For me, you've got a cracking shot there and as others have said, the staircase makes the composition work and provides reason.
I'm less of a fan of the second - some nice ideas, but it doesn't quite hang together for me and the starkness of the light does fewer favours than the softer, ambient light in the staircase.
And to disagree slightly with Simon (who, like many others on here, has forgotten more about portraiture than I'll ever know!) - don't be afraid to experiment and try different things. It's part of learning what does and doesn't work. What I will say - in support of what he's saying - is that by introducing more variables and elements, you'll almost certainly take longer to nail down what makes each photo work (or not work). There are simply more things to focus on (pardon the pun) both as photographer and critiquer so your job is made more difficult all round. However, it's fun to try different stuff and if it keeps you getting out and shooting then keep at it.
Great first attempt!