Great stuff,and some of the portraits with the delicate side lighting are superb: abuelo is beautiful!. Digital works very nicely in low light, of course, and renders shadow details well. Where it doesnt work so well is in bright light, particularly if you are shooting Jpeg. I highly recommend that you always shoot RAW and convert from there. It is a bit like working from a negative in digital form. You have much more control. Also you should scan the web for some articles on optimizing your jpgs for the web: you need to color correct slightly and adjust the levels so your contrast is increased slightly (dont just hit the contrast button -- it is better to it using levels in photoshop). Small images on computer screens need to have their brightness and contrast adjusted so as to avoid looking too flat. Then the final touch is a bit of sharpening using the unsharp mask in photoshop. Go lightly with it, but you will find that a bit of sharpening really makes the image pop on the screen. Remember that digital capture inevitably involves a bit of softening of the image. Most pros, after they derive a Tiff file from the RAW will then do a bit of "presharpening" to compensate for that softness. Then as each image is later prepared for whatever use you have in mind (publication in a magazine, printing for exhibition, or presentation on the web) they will make another pass at sharpening in accordance with what works best for that particular end product. To see what I am talking about, in terms of how all this makes the image pop, so much so that it appears almost tangible, have a look at this photo site:
Blueeyes Magazine
Keep shooting, it is a great pleasure to see the love that you bear for this place come through in your pictures. That is what makes them so good.