I liked all of your beats,especially the last one with the low piano,the drums on every beat are tight and strong,the third beat of your old works is dope too,it has an eerie vibe,no flaws,Keep it up!
I must admit, I find you used the 808 very tastefully. Usually people bring it out to the forefront, making it way too punchy, but you did a good job blending that in.
Work on your drums bro, that really holds the whole track together. Have a listen to your favourite producers and the types of drums they lay down and get your self some new kits. Then you need to focus on your composition and probably the best way to make sure its working is get someone to record some lyrics over it. I've made some beats I didn't really like and then someone else has recorded over it and made it sound mean. Check out some of my tracks on https://www.youtube.com/channel/UC5duTKBDxJrev_ZKowaQ_GA/videos and let me know what you think.