I have a couple of fave positions for front and back entry respectively.
For back entry, I do a variation of the Basset Hound position:
https://sexpositions.club/positions/17.html
My version is I have her spread her knees wide but keep her feet together, which makes her pussy and ass position lower. I then enter in an almost "seiza-style" sitting position from the back, with my knees spread wide so my thighs are on the outside of hers. This position is perfect for me. Great sexy view of her waist, ass and legs, and I get full skin-on-skin contact with her all around my groin and thighs. I can also reach her boobs and grab them, or play with her clit if I lean forward more.
Once I started doing this position I never went back to standard doggy style.
My fave front entry position is something like this:
https://sexpositions.club/positions/227.html
The only differences in my version is she'd be lying more on her back than on her side, and her leg would be on my other shoulder than what's in that pic. Some girls who didn't know what I was aiming for get a surprise when they realized how deep I can go in this position, lol...