Eyyyyyyyyyy this is pretty good bro! Banana-senpai in particular makes me giggle. :v
* Shook critical hat
There are things that must be mentioned. First of all though, i have to say that your lines are smooth as hell and i love that. Secondly, dat blur, as has been mentioned (although banana-senpai has a noticably less blurred outline). I can totally recommend using a harder brush for laying down the base colour, so you can get an outline more like the right and less like the left
. Past that though, you can handily use softer brushes for the details and shading, which i'd even recommend if you're not going for a cel-shaded look. :v (i speak from experience, smooth gradients with a hard brush is HELL ON EARTH)
Also, me being who i am, i have to speak for more contrast in the shading. I see it done too carefully so many times, and while gentle shading does have its places, meatspace actually tends to have much darker shadows than what one thinks (ESPECIALLY with sunlight, because dear god our local star is one grossly incandescent motherfucker). While you don't have to go as extreme as completely black/white shading, look how much this guy (i'd like to call him a friend but i'm not sure we talk frequently enough for that) gets away with
(tryptophobics, beware). It damn near spans the entire spectrum from black to white. Of course, metal tends to have extra high contrast (mostly in terms of reflections), but even things like fruits are going to have fairly dark shadows, so bweep bwoop.
BUT ANYWAYS YOU DOIN GOOD BRO KEEP AT IT