In general I will say that the most important thing to look out for when picking a house plot is making sure that when looking out the front of your house that the view isn't spoiled by other nearby houses. This is important in my opinion since if someone new moves into the house directly opposite yours and puts up Paissa walls it can be distracting to say the least and may make you feel like changing locations which is always a shame.
These are my favorite plots for each housing location:
Mist:
In my opinion has the best large plots in the game for sure. Any of these large plots is something to brag about since all of them are stunning.
L - #5 - Really sweet beach view and really close by to a MB.
L - #15 - The view of the Mist plots from the top of the hill really is something else. Close by to a MB.
M - #6 - Lovely beach view and no other houses blocking the view from the front of your house. Extremely close to a MB. Would probably rate this my 3rd most wanted plot.
S - #19, 20 & 21 - Beach front trio, any of these 3 plots is amazing with a special mention to 19 being closest to a MB. No other houses blocking the view. The housing NPC vendors are close by and the MB is very close by.
Lavender Beds:
My favorite housing area. Really love the green grassy hill sides and water falls all around. My favorite plots below:
L - #3 - Don't really like the large houses in Lavender Beds but #3 would be my vote since it is isolated and close by to a MB and apartments. #28 would have been my choice for best large plot if not for #29 blocking the waterfall view somewhat.
M - #11 - This is my house finally! The view of the water falls from the left and right side is amazing. Lovely garden path leading up to the house. MB close by and lots of potential neighbors to chat with (lots of small plots close by). No houses blocking the view in front of the plot. Just a relaxing slow river of water.
M - #16 - Another amazing medium. A toss between #11 and #16 for best medium in the Beds but #11 is ahead due to its slightly better location. Great water fall views from the front of the plot. Close to MB (right in front of house). Very close to the ward entrance and the festival setups.
S - #17 - The view from the front door is great as there is a waterfall view the moment you look straight ahead which is always a good thing IMO. Close to the ward entrance and MB right in front of house for convenience. No houses blocking view out front.
S - #9 - The view of the waterfall behind the house is amazing be sure to check it out! Lots of neighbor small plots nearby to chat with and close by to MB.
S - #29 - Probably one of the best small plots in the game to most people for the view. The waterfall view behind the house is stunning. It is semi-close to a MB and very isolated but I found #17 to be more to my liking.
Goblet:
Any of the houses in the Brimming hearts are particularly note worthy. Really love the changes that were made to the BH. Best plot choices below:
L - #13 - A nice view of the waterfalls. Spectacular view of the brimming heart which is also why i like the apartments in Goblet. MB is semi-close by.
M - #19 - Really great spot. It was a toss between this and Lavender Beds #11 for best medium plot in the game for me. Pool right in front of house and MB close by. Lots of potential neighbors to chat with!
S - #15 - Really nice waterfall view just out front of the plot. I rate this slightly higher than #20 because you can jump on the fence that is in front of the plot and get a great view of the brimming heart centre. Fairly close to MB (you can jump down to get to it then its a slightly longer return trip).
S - #20 - Waterfall right next to the plot. Brimming heart pools just in front of the house too. A bit further away from MB than #15 which is partly why I rate #15 higher.
Shirogane:
Not a real fan of Shirogane in general after trying out a few places. The houses seem really clustered and tend to be facing into other peoples houses which i dislike. I find the beach views at the Mist to be better so in Shirogane I rate houses which have a view of the Shirogane housing area itself. These are my choices though:
L - #16 - Lovely view of Shirogane, a nearby bamboo forest and lots of space around the plot. Semi-close to MB.
M - #28 - No house directly in front to spoil the view. Semi-close to MB. Waterfall close to the front of the plot.
(In regards to the commonly praised #8 I found #9 to be too distracting so eventually moved out however this view could potentially be blocked out with good placement of trees.) #8 is close by to MB and has hidden hot springs.
S - #29 - Very lovely small. One of the few houses in Shiro which doesn't have its view broken by other house placements. Close to MB.