OPINION ON MY CUSTOM ART?

The potted plant suffers from pillow shading. You need to contrast the shades better (dark red needs to be a darker red so there's a visible difference between red and dark red etc.). Don't use varying opacity in pixel art, use a 100% pencil tool.

see:
http://www.natomic.com/hosted/marks/mpat/shading.html

Also this is not game design.

The plant would be improved a lot by using two or three shades of green instead of just one. Don't create any sort of pattern, just give each green pixel a random color, that'll make it look like there are tiny leaves and branches overlapping.

The lamp looks too big to be a desk lamp but too short to be a floor lamp, unless your sprites are much bigger than the RTP sprites. If it's supposed to be a floor lamp, which I'd guess is the case since it's almost as tall as a person, then it needs a much smaller lampshade; that lampshade is so big that the bottom of the lampshade is waist-high. If it's supposed to be a desk lamp I'd halve the height, halve the width, and then also delete half of the visible part of the pole.

Keep scale in mind when making graphics. RTP characters are chibi proportioned, so scale is never a perfect science, but generally speaking most tiles in RMXP are made based on the assumption that characters' height is accurate and they're just way fatter than normal. So a tile is about two and a half to three feet. Whereas in RMVX the tiles are the same size as in XP, and the sprites are the same width as in XP, but much shorter. Which makes your life as a spriter harder, and also make it so any time they interact with anything it gets really stupid looking because they can't reach up to the top of the table they're standing in front of. (I tend to use RMXP sprites even when working in VX Ace. They're about the maximum amount of chibi I can tolerate.)

I actually really like all of those!