Never mind what it looks like. Are you happy with the sound? For the most part I use a four piece kit, 10", 14", 22", 14" snare. The sizes work well together for me. Sometimes I will switch out the 10" tom for a 12" tom and that works well too. I only switch it up to keep it interesting to me. The rest of the band never even notices.
If I put a number to a sound, say the 10" tom is pitch 1, then the 12" tom is pitch 3 etc. I like the combinations of sounds I get from pitch 1&5 or pitch 3&5. Pitch 1&7 to much seperation for me, however pitch 3&7 work well, not too much seperation.
This is just me and what works with how I tune and what like to hear when I strike the two toms at the same time.
Also the 10" tom makes setup a bit easier.