In my thesis I have written such sentences as:
"Murphy and Levy found that all participants used formality, titles and please/thankyou with overseas partners, however, what was perceived as impolite from both sides was different."
"These definitions undoubtedly give generalizable insights into cultural trends, however, this method is not suitable for my thesis as these types of studies either use large datasets and discourse completion tasks, or they take a more ethnographic stance looking qualitatively at two groups interacting (see e.g., Spencer-Oatey & Xing, 2003; Grainger, 2011)."
My supervisor hates it leaving such comments as "In my practice, a ‘However’ used to indicate that the following proposition contrasts in some way with the previous proposition begins a new sentence." and "As you know, I hate this ‘however’ used as ‘but’." - but am I actually grammatically wrong? Or is my usage informal/improper?