~8 months progress, bickering on whether to bulk or cut

Hi r/Fitness. I've been reading a boatload of comments here (and on other websites) the last few months, mostly looking for helpful tips and ways to improve myself.

I've been working out approximately 8 months now, doing a bit of both weightlifting and cardio. I've never followed a strict diet and workout scheme. The real change was that I quit eating nonsense food like chips and chocolate all the time, along with drinking coke and switching to milk in the morning and water the rest of the day. Now I'm eating more healthy and moderately (not counting calories, although I plan on doing that), and at dinner I eat whatever my mom has cooked.

My question here is, would it be best for me to bulk up or start cutting? This is how I look after approximately 8 months working out -- both lifting weights and doing cardio: http://imgur.com/5remz http://imgur.com/N38or

I don't have a before pic, unfortunately. Back then, I though I'd never keep at it. Now I'm actually enjoying myself.

So would it be wiser for me to bulk or cut? I would like to have both my muscles visible and keeping my athleticism. Getting 'bodybuilder big' isn't that much of a goal for me.

Thanks!