So even though their are possible absorption interactions with the TD TRT you still get the same results, i.e feeling good, strong, happy etc, as you do with the IM?
Unequivocal YES. TD will require a little more tweaking to get your levels where you want but, once they are there, they are very stable, day in and day out. With IM, you will get an immediate spike the day of injection and then it gradually decreases until the next injection. With TD, you get the same response general curve (because the the T is metabolized at about the same rate once it is in the body, irrespective of mode of administration) but you are adding T every morning, mimicking your natural T level cycle. So the levels are much more stable. To see this graphically, just google "serum testosterone levels after injection" and "serum testosterone levels using transdermal application" and compare. Both work, both can get your levels where you want them to go. If you inject daily, you would get about the same response curve as you do from TD - but who wants to inject daily?
Slims, I suggest you start with TD and see if it does the job. If it doesn't, you can always move on to IM. It's not like you are locked into one method or another. A few final thoughts ...
I do daily 250IU bHCG injections every other month to keep my HPTA (Hypothalamus-Pituitary-Testes-Axis) producing some T (as much as they can) and retard testicular atrophy. That costs $80 for a month. My doctor costs $200/visit, twice yearly. Labs are pretty expensive (but mostly covered by insurance) because she runs a full metabolic panel with CBC and hormonal (both T & E) levels twice a year. Plus PSA once a year. But you must do the labs to monitor how your body is responding to treatment. A 3-month supply of compounded (made for me) T cream costs $160. I take very little exemestane as my AI (1/4 pill each week) so that cost is minimal. So annual costs are: $400 for doctor, $650 for T, $480 for bHCG, and $400 for labs --> ~$1800 per year plus another $200 for vitamins and supplements (DHEA, NAC, etc.) Well worth the money.
However, once you start TRT and continue for years, you pretty much are committed to continue. My doctor & I started with bHCG injects to boost my natural T production and it worked, just not to the degree we both desired. My doctor likes to keep her patients at early 20 hormonal levels and I could only get to mid-30s level with bHCG. We had a reasoned and fully informed discussion of the pros & cons and I decided to take the plunge. I will stay on T as long as my health allows me to (which means good labs and cancer-free).
Good luck!