I think the placement of drums is a personal thing. Might look odd and uncomfortable to somebody else but if it works for you then great. For me personally, I like to play in an as perfect arch (D) setup from left to right I can get. I do this because I am not a tall person and it ensures I can reach for anything when I want to.
So if it were my set up I would do it this way (but as I say it's a preference).
1. I would push back the right hand tom to sit beside the smaller tom and then angel them both so the heads are facing and looking me in the face (forward).
2. I would lower the floor tom so again the head (middle) was facing me slightly so you have the two back legs at normal height with the third middle leg shorter.
3. Now I would tuck the snare above the bass drum but under the right hand tom (which should be facing angeled as mentioned above. You must make sure the bottom rim of the tom is not hitting the snare and likewise the bottom of the snare is not hitting the bass drum. Your measurements here must be precise for snare height I always put a longish beer towel on the top of the bass drum just incase the tom loosens and drops down. (learnt that from a drummer mate of mine, does happen and can happen).
4, The high hat can go to the left hand side of the snare and slightly closer to your left hand side.
5. Now fill in the spaces along the side both left and right with the cymbals. Again I would slightly angel them toward me for easy reach.
As I say the above is just an example of how I would feel comfortable if it were my set up. There are really no hard and fast rules to this. There are also no rules that say the smaller of the two toms have to be positioned on the left. If you prefer swap them over, although in the picture you show more cymbals to the left hand side of the kit so I would leave the smaller tom where it is.
Finally appearance to me is also a factor in how comfortable it makes for playing a kit. I have a tendency to adjust my heads on my toms to also be in unison and angled toward me. So my Remo heads would also be like so. Remo Remo
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so whichever way the toms line up sitting on the bass, the heads will also line up to the way I wish to see them staring back at me. This wont improve the sound any but it does make me feel good to sit at a well presented kit. (just my opinion).
This all changes of course when I am sitting on another drummers kit because, again, it is set up to his/her preference.