I only drip now also. Some observations; 510 attys get HOT! Particularly if you're using LR attys or higher voltage mods. Make sure you get a longer type drip tip.
My first tip I purchased from Heaven's Gate; type A metal. It started chipping away the metallic coating pretty much right away and will get very warm when chain vaping from my pass through at 5v.
My second I purchased from a US vendor that I won't name because their service, etc. wasn't a problem, but it was a delrin frosted tip. I like being able to see the drops going in.

However it's only about a quarter inch long and gets extremely hot. I paid about six bucks for it.
The ones I'm using now are long black nylons from Totally Wicked where I got a five pack for 8.99:
TW long Nylon Drip tip for the 510 or DSE901 plus shipping. I could swear I even get more flavor using these. I also picked up some PG to justify the shipping costs.
There is a very popular brand T-Tip that costs about 20 bucks a pop. Many swear by them but I'm not ready to pay $20 for a drip tip. Wherever and whichever you decide to go with, just make sure it's the long type. Your lips will thank you for it IMO.